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514 results on '"Gutiérrez, Miguel Ángel"'

1. Beware of CaBER: Filament thinning rheometry does not always give `the' relaxation time of polymer solutions

Author

Gaillard, Antoine, Gutierrez, Miguel Angel Herrada, Deblais, Antoine, Eggers, Jens, and Bonn, Daniel

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Fluid Dynamics
Abstract

The viscoelastic relaxation time of a polymer solution is often measured using Capillary Breakup Extensional Rheometry (CaBER) where a droplet is placed between two plates which are pulled apart to form a thinning filament. For a slow plate retraction protocol, required to avoid inertio-capillary oscillations for low-viscosity liquids, we show experimentally that the CaBER relaxation time $\tau_e$ inferred from the exponential thinning regime is in fact an apparent relaxation time that may increase significantly when increasing the plate diameter and the droplet volume. Similarly, we observe that $\tau_e$ increases with the plate diameter for the classical step-strain plate separation protocol of a commercial (Haake) CaBER device and increases with the nozzle diameter for a Dripping-onto-Substrate (DoS) method. This dependence on the flow history before the formation of the viscoelastic filament is in contradiction with polymer models such as Oldroyd-B that predict a filament thinning rate $1/3\tau$ ($\tau$ being the model's relaxation time) which is a material property independent of geometrical factors. We show that this is not due to artefacts such as solvent evaporation or polymer degradation and that it can only be rationalised by finite extensibility effects (FENE-P model) for a dilute polymer solution in a viscous solvent, but not for semi-dilute solutions in a low-viscosity solvent., Comment: 21 pages, 7 figures, presented at the ICR 2023 in Athens

Published
2023

13. Compliance with the clinical guidelines for managing asthma by primary care physicians: An ambispective observational study

Author

Abedianzadeh Timar, Mohsen, Acha Domínguez, Jesús, Aguaviva Bascuñana, Jesus, Aguilar Martín, Ignacio, Ales Conejo, Francisco Ignacio, Alfaro González, Juan Vicente, Alfonso Landa, Patricia, Altés Boronat, Andrés, Álvarez Arriero, Jesús Joaquín, Álvarez Rojo, Juan Ángel, Vidal German, Allut, Amaro Cendón, Jesús, Amiano Arregui, María Teresa, Angulo Vallejo, Esther, Anton Álvarez, Juan José, Anton Ortega, Javier, Arconada Perez, Ana, Ardiaca Burgués, Lidia, Armario Vázquez, Juan Manuel, Arroyo Cubeiro, Amador, Aso Mendialdea, Koldo, Attardo, Francesca, Ávila de Tomás, José Francisco, Avinent Arnal, M. Jesús, Aznar Aguilar, Francisco, Aznar Tejero, Pilar, Baena Montilla, Emilio, Baeza López, José María, Barón Carrillo, Juan José, Bartolomé Resano, Rafael, Becoña de la Torre, Francisco, Benavent Martín, Isabel, Benedí Sánchez, María Teresa, Berrocal del Brío, José, Blanco Delgado, Antonio, Bleda Cano, Jesús, Boladeras Sabater, Josep, Bolívar Mantilla, Zenaida, Brito Brito, Elisenda, Burgos Parra, M. Rosario, Buxadé Martí, Isaac, Caballero Garcia, Juan Carlos, Cabañas Enríquez, Luis Fernando, Calviño Cerqueiro, Marcelino, Calvo Fernández, Juan, Calle Velles, Felipe, Camaro Zafra, Beatriz, Campomar Quetlas, Jaume, Capitán Jurado, Mónica, Cárdenas Joyanes, Dolores, Carles Bueso, Gonzalo, Carvajal Puente, Cristina, Casado Rodriguez, Cristina, Casanova García, Carlos, Castellà Cahiz, Santiago, Castellà Cuesta, Cristina, Castellano Martínez, Manuel Antonio, Catalán Félez, Rafael, Cavada García, Miguel Ángel, Cavada Velasco, Antonio, Cidra Gordillo, Jose Luis, Clemente Garcia, Julia, Collada Jiménez, José Luis, Cornejo Figueroa, Andrés, Cornejo Rodríguez, Roberto, Cuevas Morales, Julio, Curado-Moliní Álvarez, María Jesús, Daviña Romero, Susana, de Arriba Muñoz, Leonor, de la Flor Benítez, Manuel, de la Poza Abad, Mariam, de los Bueis Martinez, Gustavo, de Miguel Márquez, María Pía, de Pablo Martín, Jesús, Delgado Mora, Manuel, Díaz Mateo, Joaquín, Díaz Saborido, Almudena, Díez-Caballero Murua, María, Doganis Peppas, Constantino, Domínguez Alonso, Gonzalo, Domínguez Ávila, Julián, Domínguez González, María Nieves, Domínguez Hernández, María Isabel, Dosantos Hernández, Javier Oscar, Dueñas Buey, Aurelio, Eiris Cambre, M. Jesús, El Wafa Vaca, Yussef Abu, Enseñat Sanchez, Antonio Alberto, Esquerra Tuñí, Eulalia, Esteve Ribelles, José María, Estevez Barrondo, José Antonio, Estraviz Vidal, M. Dolores, Fajardo Salguero, Rosa María, Felipe Olivero, José Francisco, Fernández Bujía, María Luisa, Fernández Cano, Patricia, Fernández Cañaveras, M. Isabel, Fernández Fernández, Carmen, Fernández García, José Manuel, Fernández Gómez, Patricia, Fernández González, José María, Fernández Gutiérrez Denia, Irene, Fernández Huelga, M. Esther, Fernández Martin, Yolanda, Fernández Navarro, Francisco, Fernández Revuelta, Araceli, Fernández Toro, José María, Fernández-Pacheco Corchado, Luis María, Ferrándiz Miquel, Joaquín, Ferrari Piquero, Carmen, Ferrer García-Borrás, José María, Gago Fernandez, Carlos, Gago Gómez, Fernando, Galera de Ulierte, Luz Inmaculada, Gallegos Juárez, Ingrid, Garceran Azorín-Gómez, José Enrique, Garcés Romero, Carmen, García Alonso, Francisco Javier, García Cabana, Andres A., García Cano, Josefa, García Ceballos, Victoria Gema, García de Francisco, Sara, García Fuentes, Francisco, García Vázquez, Yolanda, García Collado, Sergio, García-Giralda Ruiz, Luis, García-Serrano Jiménez, Beatriz, Garrido Pérez, Montse, Garro Mendiolagaray, Jon Kepa, Gea Villar, Jorge, Genover Llimona, Teresa, Gil Moreno, Felipe, Gil Pastor, Javier Julián, Gispert Servitje, Adrià, Godoy García, Isidro Domingo, Gómez Martínez, Gabriel, Gómez Sanmiguel, Francisco Javier, Gómez Yelo, Jose, Gonzales Flores, Pedro Alejandro, González Hernández, Luis, Gonzálvez Rey, Jaime, Gorgues Comas, Roberto, Guillen Anton, María Victoria, Gutiérrez Almarza, Miguel Ángel, Gutiérrez Esteban, Jose Luis, Guzón Centeno, Marta, Hermoso Sabio, Antonio, Hernández Castellanos, Manuel, Hernández Pérez, Ana, Herranz Alfaro, Alfredo, Hinojosa Díaz, José Francisco, Iglesias Fernández, José, Intxausti Erdoiza, Iñaki, Izarra Páramo, Miriam, Jiménez Marcen, Ana Isabel, Jimeno Bernad, Rosa María, Jover Andreu, María José, Juan Alcaraz, Francisco Emilio, Labrador Arranz, Esther, Laencina López, Salvador, Lapuente Troncoso, Elena, Latorre Cásedas, Montserrat, Leal Hernández, Mariano, Ledesma Santiago, Lourdes, Lillo Bravo, Francisco Javier, Lizarribar Sans, Marta, Lobato Martínez, Rocío, López Alonso, Emilia Begoña, López Cruz, Urbano, López Chamon, Silvia, López de Viñaspre Muguerza, Ana Isabel, López Herranz, Ana Belén, López Marina, Víctor, López Ortiz, Francisco, López Silva, Mª Carmen, Lucas Boronat, José María, Lugo Ramos, Héctor Leonardo, Lutz Garcia, Erika, Llosa Ventura, Juan Luis, Macías Corbacho, Antonio, Magem Niubo, Juan, Mancilla las Heras, Diego, Maneu Juan, Alfonso, Manzano Jiménez, José, Mañes Vicente, Pascual, Maranges Comella, María Isabel, Marco Segarra, Emilio, María Tablado, Miguel Ángel, Marlasca Garcia, Juan Carlos, Martí Canales, Juan Carlos, Martín Clos, José, Martín de la Vega, Saúl, Martín Ruiz Lavela, Francisco, Martinez Aparicio, M. Desamparada, Martínez de Carnero Calzada, Rafael, Martinez González, Agustín, Martínez Jiménez, Juan Manuel, Martínez Laguna, Daniel, Martínez Mayora, María Teresa, Martinez Merodio, Pilar, Martínez Novoa, Luis, Martínez Ortega, Mireia, Martínez Rojas, Francisco, Martínez Rossello, Antonio, Meijome Sánchez, María del Carmen, Méndez-Cabeza Velázquez, Jesús, Méndez Maiques, Jose María, Misericordia Garcia, Santiago, Molina Cabildo, José, Molina Martínez, Luis Javier, Monge García, José Manuel, Montes Belloso, María Ester, Moreno Molina, Susana, Motos Díaz, Patrocinio, Mourelo Cereijo, Marta, Moyá Amengual, Ana, Muñoz Ruiz, Pedro José, Narváez Martín, José María, Navarro Luna, Juan Luis, Navarro Tarin, Fernando, Nicolau Grego, Jorge, Niño Azcarate, Cristina, Nova Alvarez, José, Núñez Cordón, Juan Carlos, Olagorta de Prado, Asunción, Oros Espinosa, Vicente, Ortega Pinilla, M. Concepción, Ortega Ruiz, María Paz, Osca Pellicer, David, Otamendi Murillo, Ana, Otero Mata, Manuel, Ouzzine Marín, Myriam, Paja Fano, Eduardo, Palacio Gonzalez, Domingo, Palau Oñate, Rosario, Pazos Garrido, Néstor, Pecharroman Fuente, Virginia, Peña Rosa, Jose Manuel, Peral Cabot, Francisco Javier, Pérez Barreto, Iván Yamir, Pérez Caballero, Isabel, Pérez Fernández, Maria del Carmen, Pérez Fernández, Antonio Luis, Pérez Gutiérrez, Esteban, Pérez Rios, Manuel, Petit Sánchez, José Manuel, Piñero Acin, Maria José, Pozuelos Estrada, Jerónimo, Prieto Cid, Manuel, Prieto Gutiérrez, Joaquín, Raga Casasus, José Vicente, Ramírez Espinosa, Manuel Francisco, Rebollo Hernamperez, Eduardo, Rey Rañal, Alejandra, Ribelles Villalba, Ricardo Sagunto, Rodas Peral, José Antonio, Rodil Martinez, Aurora, Rodríguez, Manuel, José, Rodríguez Calcaño, Enrique Emperador, Rodríguez Fernandez, Concepción, Rodríguez Galipienzo, José Miguel, Rodriguez Lois, Miguel Ángel, Rodríguez Partida, José Antonio, Roel Conde, Jaime, Roman Rodriguez, Miguel, Romero Caballero, Gregorio, Romero Hernández, Pedro, Rosales García, Luis Miguel, Royo del Río, Manuel, Ruiz Gomes, María, Ruiz Moruno, Francisco Javier, Ruiz Perez, Jaime, Salinero Acevedo, José Ramón, Sánchez Apresa, Manuel, Sanchez Calavera, María Antonia, Sánchez Garcia, Fernando, Sánchez Gutiérrez, Miguel Ángel, Sánchez Ibáñez, Antonio, Sánchez López, Eugenio, Sánchez Loureiro, Manuel, Sanchez Lozano, Ana, Sánchez Romero, Gregorio, Sánchez Ruano, Fernando, Sánchez Ruiz, Gabriela, Sánchez Sanchez, Froilán, Santiago Ayarza, Asier, Santos Bermejo, Juan Antonio, Sanz de Miguel, Elena, Sanz Sanz, Marta, Sanz Velasco, Carmelina, Sauco Colón, Inmaculada, Sedano García, José Ignacio, Segovia Castro, Luis, Senan Sanz, María Rosa, Serra Cabot, Pere, Serra Gallego, Marta, Serrano Tomás, Daniel, Sesma Aisa, Francisco Tomás, Seuba Garcés, Jordi, Soler David, Vicente, Soria Mesa, Jose Antonio, Sosa Álvarez, César, Suárez Pérez, María, Tafalla Martín, Antonio, Tamayo Ferriol, Thaimi, Tamayo Marín, José Luis, Thalamas Atienza, Juan Aitor, Toledo Muñoz, Ana María, Tomás-Rodo Massaneda, Lluis Miquel, Torres de Castro, Milko, Torres Martínez, Francisco Javier, Tovar Álvarez, Enrique, Ugarte Goñi, Ainhoa, Valle González, Irene, Vasco Mahillo, Sonia, Enrique José, Vázquez Seijas, Vericat Roure, Antonio, Villalba Parrado, Arelis, Villanueva Rebollo, Jose María, Villar Valgañon, Ricardo, Villena Masegosa, Vicente, Viñals Gigena, Montserrat, Viñas Cabrera, Lydia, Zarco Pinteño, David, Roman-Rodriguez, M., Molina-Paris, J., and Fernandez Sanchez, A.

Published
2021
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14. Seguimiento de las guías españolas para el manejo del asma por el médico de atención primaria: un estudio observacional ambispectivo

Author

Abedianzadeh Timar, Mohsen, Acha Domínguez, Jesús, Aguaviva Bascuñana, Jesus, Aguilar Martín, Ignacio, Ales Conejo, Francisco Ignacio, Alfaro González, Juan Vicente, Alfonso Landa, Patricia, Altés Boronat, Andrés, Álvarez Arriero, Jesús Joaquín, Álvarez Rojo, Juan Ángel, Vidal German, Allut, Amaro Cendón, Jesús, Amiano Arregui, María Teresa, Angulo Vallejo, Esther, Anton Álvarez, Juan José, Anton Ortega, Javier, Arconada Perez, Ana, Ardiaca Burgués, Lidia, Armario Vázquez, Juan Manuel, Arroyo Cubeiro, Amador, Aso Mendialdea, Koldo, Attardo, Francesca, Ávila de Tomás, José Francisco, Avinent Arnal, M. Jesús, Aznar Aguilar, Francisco, Aznar Tejero, Pilar, Baena Montilla, Emilio, Baeza López, José María, Barón Carrillo, Juan José, Bartolomé Resano, Rafael, Becoña de la Torre, Francisco, Benavent Martín, Isabel, Benedí Sánchez, María Teresa, Berrocal del Brío, José, Blanco Delgado, Antonio, Bleda Cano, Jesús, Boladeras Sabater, Josep, Bolívar Mantilla, Zenaida, Brito Brito, Elisenda, Burgos Parra, M. Rosario, Buxadé Martí, Isaac, Caballero Garcia, Juan Carlos, Cabañas Enríquez, Luis Fernando, Calviño Cerqueiro, Marcelino, Calvo Fernández, Juan, Calle Velles, Felipe, Camaro Zafra, Beatriz, Campomar Quetlas, Jaume, Capitán Jurado, Mónica, Cárdenas Joyanes, Dolores, Carles Bueso, Gonzalo, Carvajal Puente, Cristina, Casado Rodriguez, Cristina, Casanova García, Carlos, Castellà Cahiz, Santiago, Castellà Cuesta, Cristina, Castellano Martínez, Manuel Antonio, Catalán Félez, Rafael, Cavada García, Miguel Ángel, Cavada Velasco, Antonio, Cidra Gordillo, Jose Luis, Clemente Garcia, Julia, Collada Jiménez, José Luis, Cornejo Figueroa, Andrés, Cornejo Rodríguez, Roberto, Cuevas Morales, Julio, Curado-Moliní Álvarez, María Jesús, Daviña Romero, Susana, de Arriba Muñoz, Leonor, de la Flor Benítez, Manuel, de la Poza Abad, Mariam, de los Bueis Martinez, Gustavo, de Miguel Márquez, María Pía, de Pablo Martín, Jesús, Delgado Mora, Manuel, Díaz Mateo, Joaquín, Díaz Saborido, Almudena, Díez-Caballero Murua, María, Doganis Peppas, Constantino, Domínguez Alonso, Gonzalo, Domínguez Ávila, Julián, Domínguez González, María Nieves, Domínguez Hernández, María Isabel, Dosantos Hernández, Javier Oscar, Dueñas Buey, Aurelio, Eiris Cambre, M. Jesús, El Wafa Vaca, Yussef Abu, Enseñat Sanchez, Antonio Alberto, Esquerra Tuñí, Eulalia, Esteve Ribelles, José María, Estevez Barrondo, José Antonio, Estraviz Vidal, M. Dolores, Fajardo Salguero, Rosa María, Felipe Olivero, José Francisco, Fernández Bujía, María Luisa, Fernández Cano, Patricia, Fernández Cañaveras, M. Isabel, Fernández Fernández, Carmen, Fernández García, José Manuel, Fernández Gómez, Patricia, Fernández González, José María, Fernández Gutiérrez Denia, Irene, Fernández Huelga, M. Esther, Fernández Martin, Yolanda, Fernández Navarro, Francisco, Fernández Revuelta, Araceli, Fernández Toro, José María, Fernández-Pacheco Corchado, Luis María, Ferrándiz Miquel, Joaquín, Ferrari Piquero, Carmen, Ferrer García-Borrás, José María, Gago Fernandez, Carlos, Gago Gómez, Fernando, Galera de Ulierte, Luz Inmaculada, Gallegos Juárez, Ingrid, Garceran Azorín-Gómez, José Enrique, Garcés Romero, Carmen, García Alonso, Francisco Javier, García Cabana, Andres A., García Cano, Josefa, García Ceballos, Victoria Gema, García de Francisco, Sara, García Fuentes, Francisco, García Vázquez, Yolanda, García Collado, Sergio, García-Giralda Ruiz, Luis, García-Serrano Jiménez, Beatriz, Garrido Pérez, Montse, Garro Mendiolagaray, Jon Kepa, Gea Villar, Jorge, Genover Llimona, Teresa, Gil Moreno, Felipe, Gil Pastor, Javier Julián, Gispert Servitje, Adrià, Godoy García, Isidro Domingo, Gómez Martínez, Gabriel, Gómez Sanmiguel, Francisco Javier, Gómez Yelo, Jose, Gonzales Flores, Pedro Alejandro, González Hernández, Luis, Gonzálvez Rey, Jaime, Gorgues Comas, Roberto, Guillen Anton, María Victoria, Gutiérrez Almarza, Miguel Ángel, Gutiérrez Esteban, Jose Luis, Guzón Centeno, Marta, Hermoso Sabio, Antonio, Hernández Castellanos, Manuel, Hernández Pérez, Ana, Herranz Alfaro, Alfredo, Hinojosa Díaz, José Francisco, Iglesias Fernández, José, Intxausti Erdoiza, Iñaki, Izarra Páramo, Miriam, Jiménez Marcen, Ana Isabel, Jimeno Bernad, Rosa María, Jover Andreu, María José, Juan Alcaraz, Francisco Emilio, Labrador Arranz, Esther, Laencina López, Salvador, Lapuente Troncoso, Elena, Latorre Cásedas, Montserrat, Leal Hernández, Mariano, Ledesma Santiago, Lourdes, Lillo Bravo, Francisco Javier, Lizarribar Sans, Marta, Lobato Martínez, Rocío, López Alonso, Emilia Begoña, López Cruz, Urbano, López Chamon, Silvia, López de Viñaspre Muguerza, Ana Isabel, López Herranz, Ana Belén, López Marina, Víctor, López Ortiz, Francisco, López Silva, M.a Carmen, Lucas Boronat, José María, Lugo Ramos, Héctor Leonardo, Lutz Garcia, Erika, Llosa Ventura, Juan Luis, Macías Corbacho, Antonio, Magem Niubo, Juan, Mancilla las Heras, Diego, Maneu Juan, Alfonso, Manzano Jiménez, José, Mañes Vicente, Pascual, Maranges Comella, María Isabel, Marco Segarra, Emilio, María Tablado, Miguel Ángel, Marlasca Garcia, Juan Carlos, Martí Canales, Juan Carlos, Martín Clos, José, Martín de la Vega, Saúl, Martín Ruiz Lavela, Francisco, Martinez Aparicio, M. Desamparada, Martínez de Carnero Calzada, Rafael, Martinez González, Agustín, Martínez Jiménez, Juan Manuel, Martínez Laguna, Daniel, Martínez Mayora, María Teresa, Martinez Merodio, Pilar, Martínez Novoa, Luis, Martínez Ortega, Mireia, Martínez Rojas, Francisco, Martínez Rossello, Antonio, Meijome Sánchez, María del Carmen, Méndez-Cabeza Velázquez, Jesús, Méndez Maiques, Jose María, Misericordia Garcia, Santiago, Molina Cabildo, José, Molina Martínez, Luis Javier, Monge García, José Manuel, Montes Belloso, María Ester, Moreno Molina, Susana, Motos Díaz, Patrocinio, Mourelo Cereijo, Marta, Moyá Amengual, Ana, Muñoz Ruiz, Pedro José, Narváez Martín, José María, Navarro Luna, Juan Luis, Navarro Tarin, Fernando, Nicolau Grego, Jorge, Niño Azcarate, Cristina, Nova Alvarez, José, Núñez Cordón, Juan Carlos, Olagorta de Prado, Asunción, Oros Espinosa, Vicente, Ortega Pinilla, M. Concepción, Ortega Ruiz, María Paz, Osca Pellicer, David, Otamendi Murillo, Ana, Otero Mata, Manuel, Ouzzine Marín, Myriam, Paja Fano, Eduardo, Palacio Gonzalez, Domingo, Palau Oñate, Rosario, Pazos Garrido, Néstor, Pecharroman Fuente, Virginia, Peña Rosa, Jose Manuel, Peral Cabot, Francisco Javier, Pérez Barreto, Iván Yamir, Pérez Caballero, Isabel, Pérez Fernández, Maria del Carmen, Pérez Fernández, Antonio Luis, Pérez Gutiérrez, Esteban, Pérez Rios, Manuel, Petit Sánchez, José Manuel, Piñero Acin, Maria José, Pozuelos Estrada, Jerónimo, Prieto Cid, Manuel, Prieto Gutiérrez, Joaquín, Raga Casasus, José Vicente, Ramírez Espinosa, Manuel Francisco, Rebollo Hernamperez, Eduardo, Rey Rañal, Alejandra, Ribelles Villalba, Ricardo Sagunto, Rodas Peral, José Antonio, Rodil Martinez, Aurora, Rodríguez, Manuel, José, Rodríguez Calcaño, Enrique Emperador, Rodríguez Fernandez, Concepción, Rodríguez Galipienzo, José Miguel, Rodriguez Lois, Miguel Ángel, Rodríguez Partida, José Antonio, Roel Conde, Jaime, Roman Rodriguez, Miguel, Romero Caballero, Gregorio, Romero Hernández, Pedro, Rosales García, Luis Miguel, Royo del Río, Manuel, Ruiz Gomes, María, Ruiz Moruno, Francisco Javier, Ruiz Perez, Jaime, Salinero Acevedo, José Ramón, Sánchez Apresa, Manuel, Sanchez Calavera, María Antonia, Sánchez Garcia, Fernando, Sánchez Gutiérrez, Miguel Ángel, Sánchez Ibáñez, Antonio, Sánchez López, Eugenio, Sánchez Loureiro, Manuel, Sanchez Lozano, Ana, Sánchez Romero, Gregorio, Sánchez Ruano, Fernando, Sánchez Ruiz, Gabriela, Sánchez Sanchez, Froilán, Santiago Ayarza, Asier, Santos Bermejo, Juan Antonio, Sanz de Miguel, Elena, Sanz Sanz, Marta, Sanz Velasco, Carmelina, Sauco Colón, Inmaculada, Sedano García, José Ignacio, Segovia Castro, Luis, Senan Sanz, María Rosa, Serra Cabot, Pere, Serra Gallego, Marta, Serrano Tomás, Daniel, Sesma Aisa, Francisco Tomás, Seuba Garcés, Jordi, Soler David, Vicente, Soria Mesa, Jose Antonio, Sosa Álvarez, César, Suárez Pérez, María, Tafalla Martín, Antonio, Tamayo Ferriol, Thaimi, Tamayo Marín, José Luis, Thalamas Atienza, Juan Aitor, Toledo Muñoz, Ana María, Tomás-Rodo Massaneda, Lluis Miquel, Torres de Castro, Milko, Torres Martínez, Francisco Javier, Tovar Álvarez, Enrique, Ugarte Goñi, Ainhoa, Valle González, Irene, Vasco Mahillo, Sonia, Enrique José, Vázquez Seijas, Vericat Roure, Antonio, Villalba Parrado, Arelis, Villanueva Rebollo, Jose María, Villar Valgañon, Ricardo, Villena Masegosa, Vicente, Viñals Gigena, Montserrat, Viñas Cabrera, Lydia, Zarco Pinteño, David, Roman-Rodriguez, M., Molina-Paris, J., and Fernandez-Sanchez, A.

Published
2021
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17. Bipartite sesamoid in adolescent

Author

Jiménez de la Jara, Beatriz, primary, Izquierdo Frechilla, Jana, additional, Davydoff Pastor, Elena, additional, and Molina Gutiérrez, Miguel Ángel, additional

Published
2024
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24. Emergency department evaluation of transplanted children with COVID-19.

Author

Barreiro Pérez, Sagrario, Molina Gutiérrez, Miguel Ángel, Antoñanzas Bernar, Valeria, Storch-de-Gracia, Pilar, and Mesa García, Sofía

Abstract

Children usually have an asymptomatic or mild course of SARS-CoV-2 infection, studies in immunocompromised patients have shown a different evolution. The aim of this study was to describe the clinical, laboratory, and radiologic manifestations of pediatric solid organ transplant (SOT) and hematopoietic stem cell transplant (HSCT) patients testing positive for SARS-CoV-2. A multicenter retrospective, observational descriptive study was conducted in 3 tertiary hospitals in Madrid (Spain) between March 2020 and December 2022. Consecutive patients aged 0–18 attending the corresponding pediatric emergency departments with a positive result in the real-time polymerase chain reaction test or antigenic test to detect SARS-CoV-2 in the nasopharyngeal sample were included. A total of 31 children were included in the study. Sixteen (51.6%) were patients with HSCT and 15 (48.3) were patients with SOT. The median time from transplantation to COVID-19 was 1.2 years (IQR:0.5–5.1). The SOT cohort included liver (n = 4, 12.9%), kidney (n = 4, 12.9%), heart (n = 3, 9.7%), multivisceral (n = 3, 9.7%), and lung (n = 1, 3.2%). Of the 31 patients, only one was asymptomatic. The most common symptom on presentation was fever (76.7%). Abnormalities were seen on chest X-ray in 8 (66.6%) of the 12 patients. There was no significant difference in clinical manifestations, lymphopenia and radiological findings regardless of the type of transplantation or immunosuppression status. Thirteen patients (41.9%) were hospitalized. There were no patient deaths. In our study, we found that the clinical course and outcome of SOT and HSCT pediatric patients with COVID-19 were generally favorable. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Aventuras de emprendimiento sostenible

Author

Ruíz Arias, Catalina Lucía, primary, Echeverry Pérez, Paula, additional, Martínez Sepúlveda, José Alejandro, additional, Zuñiga Gutiérrez, Miguel Ángel, additional, García Martín, Bibian Ximena, additional, Orozco, Diana Marcela, additional, Orozco Triana, Jairo Alonso, additional, Castillo Prada, Rocio, additional, Jiménez Hernández, Claudia, additional, Rinaudo Mannucci, María Eugenia, additional, and Reyes Giraldo, Darío Mauricio, additional

Published
2020
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28. La educación superior al servicio del desarrollo rural en escenarios de paz y reconciliación. Departamentos: Meta y Guaviare

Author

Londoño Pérez, Cesar Augusto, primary, Pacheco Pérez, Camilo Ernesto, additional, Concunubo Cocunubo, Nancy Giovanna, additional, Olarte Buritica, Saulo Andrés, additional, Vargas Tocasuche, Sandra Milena, additional, Bolaños Aranda, Edgar, additional, Mancera Ortiz, Andrés Mauricio, additional, Gutiérrez Gutiérrez, Miguel Ángel, additional, Cárdenas Otaya, Luis Alberto, additional, Reina Pardo, Erika Astrid, additional, Smith Rojas, Joyce, additional, Castillo Rojas, Jorge Iván, additional, Prieto Delgadillo, Mario Fernando, additional, Riveros Romero, Miguel Andrés, additional, Cuellar Rodríguez, Rene Ricardo, additional, Maldonado Osorio, Víctor Mauricio, additional, Rodríguez, Aura Luz, additional, Gartner Trejos, Jesús Alejandro, additional, Velásquez Balaguera, Jesús Andrés, additional, Barrera Granados, Heidy Katherine, additional, Bernate Martínez, Juan Manuel, additional, Colunge Cabrera, Doryan Erik, additional, Espinosa Valencia, Cristian Camilo, additional, Ávila Sierra, Héctor Manuel, additional, González Cárdenas, Alejandro, additional, Rangel Pachón, David Eduardo, additional, Pineda Alagarra, Carlos Oneyber, additional, Mora Muñoz, Víctor Alfonso, additional, Choque Ladino, Nelvar, additional, Palacios Nieto, Nubia Liliana, additional, González Valenzuela, Miguel Felipe, additional, and Prieto, Miguel Antonio, additional

Published
2020
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29. El Escorial de abajo: una villa a la sombra del Real Monasterio después de la Guerra de la Independencia

Author

Bringas Gutiérrez, Miguel Ángel, Camarero Bullón, Concepción, and Universidad de Cantabria

Subjects
History, Martín de Garay, Literature and Literary Theory, Visual Arts and Performing Arts, Padrón general, Cuaderno de la riqueza, Villa de El Escorial, 1818-1824
Abstract

En este artículo abordamos algunas cuestiones generales sobre la historia de la villa de El Escorial a partir del análisis de dos fuentes históricas elaboradas entre 1818 y 1824: el cuaderno general de la riqueza de 1818-1820 y el padrón general del vecindario de 1824. El primero es una estadística de la riqueza y de la producción cuyo origen está en relación con el intento de realizar una profunda reforma de la hacienda impulsada por Martín de Garay durante el reinado de Fernando VII. Con esta documentación se analizan por primera vez las bases que sustentaban la economía de El Escorial pocos años después de finalizada la Guerra de la Independencia. Se constata el decisivo peso que la explotación de los montes y la ganadería tenían en la economía local. Y, el segundo, recoge de forma detallada las principales características de la población escurialense (sexo, edad, profesión, número de familias, etc.) entre ellas, la importancia que tuvo el componente inmigratorio a la hora de explicar la configuración de su estructura demográfica.

Published
2022

30. Osteocondroma arborizante gigante de larga evolución en quinto metacarpiano. Caso clínico.

Author

SÁNCHEZ DELGADO, Yazmin, BRETÓN GUTIÉRREZ, Miguel Ángel, LIMA ROMERO, Alfredo, MARTÍNEZ BAHENA, Grecia Maricela, and SERRANO BELLO, Carlos Alberto

Abstract

Osteochondroma represents about 9% of all bone tumors and between 20% and 50% of benign bone tumors in the hand. A case of a 25-year-old female patient with a 14-yearold bone tumor at the base of the right fifth metacarpal is reported. It presents an exophytic bicuneiform tumor measuring 4x3x3 cm, bilobed, with bony characteristics. The tomography reports a bone lesion with expansive increase and disordered proliferation of bone tissue, pedunculated base and exophytic growth. Pathology study reports osteochondroma of 4.5 cm in the long axis, cartilage cap of 0.5 cm. The objective of the presentation of this case is to report a long-evolving giant osteochondroma, with very considerable dimensions and bilobed protrusion, in the fifth metacarpal of a young patient. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Streptococcus pyogenes infections in Spanish children before and after the COVID pandemic. Coming back to the previous incidence

Author

de Ceano-Vivas, María, primary, Molina Gutiérrez, Miguel Ángel, additional, Mellado-Sola, Isabel, additional, García Sánchez, Paula, additional, Grandioso, David, additional, Calvo, Cristina, additional, López López, Rosario, additional, Bueno-Barriocanal, Marta, additional, Ruiz Domínguez, José A., additional, and de Miguel, Begoña, additional

Published
2023
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32. Estudio de la estabilidad global de flujos laminares alrededor de perfiles NACA 2412

Author

Herrada Gutiérrez, Miguel Ángel, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Sánchez Mora, Pablo, Herrada Gutiérrez, Miguel Ángel, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, and Sánchez Mora, Pablo

Abstract

Una aeronave que vuela en el seno de una corriente de aire moviéndose a una velocidad que forma un ángulo elevado con respecto a la corriente, es decir, un ángulo de ataque alto, puede experimentar la entrada en pérdida, momento en que la sustentación cae de forma súbita y puede perderse el control. Antes de llegar a este punto, el flujo de aire deja de ser estable, formándose vórtices y desprendiéndose la capa límite, entre otros fenómenos. A lo largo de los cuatro cursos del grado, se estudian y detallan problemas en las que se suponen ángulos de ataque pequeños, con el objetivo de asegurar la estabilidad del flujo en todo momento. En este documento, se investigan perfiles aerodinámicos con diferentes ángulos de ataque, buscando el momento en que la corriente pasa a ser inestable, para conocer los rangos de trabajos que deben seguir para que no se produzca la entrada en pérdida, sirviendo de introducción a este campo de estudio. Se comparan soluciones de un perfil simétrico y uno asimétrico, así como los resultados en dos programas informáticos, MATLAB y ANSYS FLUENT, permitiendo conocer por primera vez este segundo software, ampliamente usado en el campo de la dinámica de fluidos computacional., An aircraft flying within an airflow moving at a speed that forms a high angle to the airflow, i.e. a high angle of attack, may experience stall, where the lift suddenly decreases and control may be lost. Before reaching this point, the airflow is no longer stable, vortices are formed and the boundary layer is shed, among other phenomena. Throughout the course, problems where small angles of attack are assumed are studied and detailed, with the aim of ensuring the stability of the flow at all times. In this paper, airfoils with different angles of attack are investigated, looking for the moment when the flow becomes unstable, in order to know the working ranges that must be followed to avoid stall, serving as an introduction to this field of study. Solutions of a symmetrical and an asymmetrical profile are compared, as well as the results in two computer programs, MATLAB and ANSYS FLUENT, allowing to know for the first time this second software, widely used in the field of computational fluid dynamics.

Published
2023

33. Estudio de la estabilidad global de flujos laminares alrededor de perfiles NACA 0012

Author

Herrada Gutiérrez, Miguel Ángel, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Rivera Míguez, Alejandro, Herrada Gutiérrez, Miguel Ángel, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, and Rivera Míguez, Alejandro

Abstract

Una aeronave que vuela en el seno de una corriente de aire moviéndose a una velocidad que forma un ángulo elevado con respecto a la corriente, es decir, un ángulo de ataque alto, puede experimentar la entrada en pérdida, momento en que la sustentación cae de forma súbita y puede perderse el control. Antes de llegar a este punto, el flujo de aire deja de ser estable, formándose vórtices y desprendiéndose la capa límite, entre otros fenómenos. A lo largo de la carrera, se estudian y detallan problemas en las que se suponen ángulos de ataque pequeños, con el objetivo de asegurar la estabilidad del flujo en todo momento. En este documento, se investigan perfiles aerodinámicos con diferentes ángulos de ataque, buscando el momento en que la corriente pasa a ser inestable, para conocer los rangos de trabajos que deben seguir con objeto a no producirse la entrada en pérdida, sirviendo de introducción a este campo de estudio. Se comparan soluciones de un perfil simétrico y uno asimétrico, así como los resultados en dos programas informáticos, MATLAB y ANSYS FLUENT, permitiendo conocer por primera vez este segundo software, ampliamente usado en el campo de la dinámica de fluidos computacional., An aircraft flying within an airflow moving at a speed that forms a high angle to the airflow, i.e. a high angle of attack, may experience stall, where the lift suddenly decreases and control may be lost. Before reaching this point, the airflow is no longer stable, vortices are formed and the boundary layer is shed, among other phenomena. Throughout the course, problems where small angles of attack are assumed are studied and detailed, with the aim of ensuring the stability of the flow at all times. In this paper, airfoils with different angles of attack are investigated, looking for the moment when the flow becomes unstable, in order to know the working ranges that must be followed to avoid stall, serving as an introduction to this field of study. Solutions of a symmetrical and an asymmetrical profile are compared, as well as the results in two computer programs, MATLAB and ANSYS FLUENT, allowing to know for the first time this second software, widely used in the field of computational fluid dynamics.

Published
2023

34. Influencia de la pandemia de la COVID-19 en la distribución de la bronquiolitis aguda en España

Author

Molina Gutiérrez, Miguel Ángel, Martínez Paz, Patricia, Montero Alonso, María, Concheiro Guisán, Ana, Villares Porto-Dominguez, Ana Isabel, Casero González, María Marina, Bautista Lozano, Diego, Oliver Olid, Asier, Quiroga de Castro, Arancha, Molina Gutiérrez, Miguel Ángel, Martínez Paz, Patricia, Montero Alonso, María, Concheiro Guisán, Ana, Villares Porto-Dominguez, Ana Isabel, Casero González, María Marina, Bautista Lozano, Diego, Oliver Olid, Asier, and Quiroga de Castro, Arancha

Abstract

BACKGROUND // Bronchiolitis is the leading cause of hospitalization in children under one year of age, with annual epidemics. Since the onset of the SARS-CoV-2 coronavirus disease pandemic (COVID-19), there has been a change in the transmission of other respiratory viruses. Our aim in this paper was to describe how COVID-19 had affected the distribution of acute bronchiolitis in our country. METHODS // We conducted a retrospective descriptive study of the cases of bronchiolitis treated in a sample of Spanish hospitals belonging to four autonomous communities. A chi-square test and Student’s t- test were used to compare epidemiological and demographic variables between patients attending the hospital with bronchiolitis during January 2021-June 2021 with patients attending the hospital in the previous three years (2018-2020). RESULTS // We analyzed 6,124 cases of bronchiolitis (58.8% males and 41.2% females). The mean age was 0.5 years (SD: 0.4). In 2020, we observed a decrease of bronchiolitis cases compared to 2019 of 67%. During 2020 and 2021, the epidemic season started in January-February and peaked in June. During the first half of 2021, the highest percentage of admissions for bronchiolitis associated with RSV infection was observed in hospitals in central Spain corresponding to the Autonomous Community of Madrid (78.5% of admissions). CONCLUSIONS // The COVID-19 pandemic significantly modifies the seasonality of bronchiolitis. In our country, the flow and distribution of the disease are not uniform. It starts in the center of Spain and ends on the coast., FUNDAMENTOS // La bronquiolitis es la primera causa de hospitalización en menores de un año, presentándose en forma de epidemias anuales. Desde el inicio de la pandemia por la enfermedad causada por el coronavirus SARS-CoV-2 (COVID-19) se ha producido un cambio en la transmisión de otros virus respiratorios. Nuestro objetivo en este trabajo fue describir cómo había afectado la pandemia de la COVID-19 a la distribución de la bronquiolitis aguda en nuestro país. MÉTODOS // Realizamos un estudio descriptivo retrospectivo de los casos de bronquiolitis atendidos en una muestra de hospitales españoles que pertenecían a cuatro comunidades autónomas. Empleado el test chi-cuadrado y la prueba t de Student comparamos variables epidemiológicas y demográficas de los casos de bronquiolitis atendidos durante enero de 2021 y junio 2021, con los tres años anteriores (2018-2020). RESULTADOS // Analizamos 6.124 casos de bronquiolitis (58,8% varones y 41,2% mujeres). La media de edad fue de 0,5 años (DE: 0,4). En 2020 observamos un descenso de casos de bronquiolitis con respecto a 2019 del 67%. Durante 2020 y 2021 la temporada epidémica empezó en enero-febrero y alcanzó su pico máximo en junio. Durante el primer semestre de 2021, el porcentaje más elevado de ingresos por bronquiolitis asociados a infección VRS fue observado en hospitales del centro de España correspondientes a la Comunidad Autónoma de Madrid (78,5% de los ingresos). CONCLUSIONES // La pandemia por la COVID-19 modifica de manera significativa la estacionalidad de la bronquiolitis. En nuestro país, el flujo y distribución de la enfermedad no es uniforme, comenzado por el centro peninsular y, por último, la zona litoral.

Published
2023

35. Effects of geometry in the operation of coaxial electrosprays

Author

Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluídica, López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gamero-Castaño, M., Gañán-Calvo, Alfonso M., Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluídica, López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gamero-Castaño, M., and Gañán-Calvo, Alfonso M.

Abstract

Coaxial electrospray is a well established procedure to generate coaxial micro- and nano-structures (microcapsules and coaxial fibers). In this work we show the capabilities of a high-precision numerical code using dynamic mapping, analytic Jacobian formulation and the Taylor–Melcher leaky dielectric model (LDM) to deal with real coaxial electrospray configurations. Since the number of parameters involved in the problem is large, we focus on an experimentally tested liquid pair configuration where the thickness, relative position, and end sharpness of the coaxial feeding tubes are geometrical parameters of interest. The effects of those parameters and the voltage applied at the tubes on the coaxial liquid menisci, liquid streamlines, size of jet and core, and electric current are discussed.

Published
2023

36. Global stability analysis of bubbles rising in a vertical capillary with an external flow

Author

Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluidica, Ministerio de Economía y Competitividad (MINECO). España, Junta de Andalucía, National Science Foundation (NSF). United States, Herrada Gutiérrez, Miguel Ángel, Yu, Yingxian Estella, Stone, Howard A., Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluidica, Ministerio de Economía y Competitividad (MINECO). España, Junta de Andalucía, National Science Foundation (NSF). United States, Herrada Gutiérrez, Miguel Ángel, Yu, Yingxian Estella, and Stone, Howard A.

Abstract

We study the linear stability of bubbles in a capillary tube under external flow. Yu et al. (J. Fluid Mech., vol. 911, 2021, pp. 1-19) showed that a rich variety of bubble dynamics occurs when a downward external flow is applied, opposing the buoyancy-driven ascent of the bubble. They found experimentally and numerically the existence of two branches of solutions that overlap over a finite range of the capillary number of the downward external flow in cases where the Reynolds number is small and the Bond number is larger than the critical value for which the bubble can rise spontaneously (Bretherton, J. Fluid Mech., vol. 10, issue 2, 1961, pp. 166-188). Furthermore, inertialess, symmetry-breaking steady-state shapes were found as the bubble transits near the tipping points of the solution branches. In this work, using steady axisymmetric simulations, we show that the reported multiplicity of solutions can be described using bifurcation diagrams with three branches of steady axisymmetric solutions and two limit points. The linear global stability analysis of the different branches of the stationary axisymmetric solutions demonstrates that the symmetry breaking is due to the development of three-dimensional instabilities with azimuthal wavenumber.

Published
2023

37. The role of charge relaxation in electrified tip streaming

Author

Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de fluidos y microfluídica, Ministerio de Ciencia e Innovación (MICIN). España, Rubio, M., Rodríguez-Díaz, P., López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gañán-Calvo, Alfonso M., Montanero Fernández, José María, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de fluidos y microfluídica, Ministerio de Ciencia e Innovación (MICIN). España, Rubio, M., Rodríguez-Díaz, P., López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gañán-Calvo, Alfonso M., and Montanero Fernández, José María

Abstract

We study experimentally and numerically the onset of tip streaming in an electrified droplet. The experiments show that, for a sufficiently small dimensionless conductivity, the droplet apex oscillates before ejecting a liquid jet. This effect is caused by the limited charge transfer from the bulk to the interface. This reduces the electrostatic pressure at the droplet's stretching tip, preventing liquid ejection. This reduction of the electrostatic pressure is compensated for by the electric shear stress arising during apex oscillations, which eventually leads to the jet formation. The stability limit calculated from the global stability analysis perfectly agrees with experimental results. However, this analysis predicts non-oscillatory, non-localized instability in all the cases, suggesting that both the oscillatory behavior and the small local scale characterizing tip streaming arise during the nonlinear droplet deformation.

Published
2023

38. Electrokinetic modelling of cone-jet electrosprays

Author

Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluidica, Fondo Europeo de Desarrollo Regional (FEDER), Junta de Andalucía, Ministerio de Ciencia e Innovación (MICIN). España, López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gañán-Calvo, Alfonso M., Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de Fluidos y Microfluidica, Fondo Europeo de Desarrollo Regional (FEDER), Junta de Andalucía, Ministerio de Ciencia e Innovación (MICIN). España, López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, and Gañán-Calvo, Alfonso M.

Abstract

The physics of electrospray has been subject to an intense debate for three decades regarding the ultimate electrokinetics that determines the electric current and the size of the emitted droplets in the steady Taylor cone-jet mode (TCJ). In order to solve with a high degree of accuracy the complete electrokinetic structure of the TCJ, in this work, we have used the full Poisson–Nernst–Planck model electrokinetic equations, which have been solved using a high accuracy numerical scheme. We consider a formulation with no interfacial adsorption of ions, as in Mori & Young (J. Fluid Mech., vol. 855, 2018, pp. 67–130). Our simulations corroborate Mori and Young’s conclusion that the classical leaky dielectric model (LDM) recovers the electrodiffusion theory for weak electrolytes when disregarding ion adsorption at the interface. However, for strong electrolytes, our results differ drastically from those provided by the LDM. In this case, we observe that the ion distribution, and consequently the conductivity in the bulk, can be strongly non-homogeneous. Given the rather universal validity of the LDM experimentally observed so far, we postulate that ion interfacial adsorption must be considered in the case of strong, highly dissociated electrolytes to retrieve the LDM limit, mostly for a cone jet operating in the vicinity of the minimum flow rate.

Published
2023

44. The role of charge relaxation in electrified tip streaming

Author

Rubio, M., Rodríguez-Díaz, P., López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gañán-Calvo, Alfonso M., Montanero Fernández, José María, Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Universidad de Sevilla. TEP219: Física de fluidos y microfluídica, and Ministerio de Ciencia e Innovación (MICIN). España

Subjects
Electrohydrodynamics
Abstract

We study experimentally and numerically the onset of tip streaming in an electrified droplet. The experiments show that, for a sufficiently small dimensionless conductivity, the droplet apex oscillates before ejecting a liquid jet. This effect is caused by the limited charge transfer from the bulk to the interface. This reduces the electrostatic pressure at the droplet's stretching tip, preventing liquid ejection. This reduction of the electrostatic pressure is compensated for by the electric shear stress arising during apex oscillations, which eventually leads to the jet formation. The stability limit calculated from the global stability analysis perfectly agrees with experimental results. However, this analysis predicts non-oscillatory, non-localized instability in all the cases, suggesting that both the oscillatory behavior and the small local scale characterizing tip streaming arise during the nonlinear droplet deformation.

Published
2023

45. Effects of geometry in the operation of coaxial electrosprays

Author

López-Herrera Sánchez, José María, Herrada Gutiérrez, Miguel Ángel, Gamero-Castaño, M., Gañán-Calvo, Alfonso M., Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, and Universidad de Sevilla. TEP219: Física de Fluidos y Microfluídica

Subjects
Taylor cone jet, Coaxial electrospray, Leaky dielectric model, Electrospray
Abstract

Coaxial electrospray is a well established procedure to generate coaxial micro- and nano-structures (microcapsules and coaxial fibers). In this work we show the capabilities of a high-precision numerical code using dynamic mapping, analytic Jacobian formulation and the Taylor–Melcher leaky dielectric model (LDM) to deal with real coaxial electrospray configurations. Since the number of parameters involved in the problem is large, we focus on an experimentally tested liquid pair configuration where the thickness, relative position, and end sharpness of the coaxial feeding tubes are geometrical parameters of interest. The effects of those parameters and the voltage applied at the tubes on the coaxial liquid menisci, liquid streamlines, size of jet and core, and electric current are discussed. Junta de Andalucía P18-FR-3375 Agencia Estatal de Investigación PCI2018-093040, PID2019-108278RB

Published
2022

48. Clinical Characteristics of Omicron (B.1.1.529) Variant in Children: A Multicenter Study in Spain

Author

Molina Gutiérrez, Miguel Ángel, primary, Sánchez Trujillo, Lara, additional, Ruiz Domínguez, José Antonio, additional, Callejas Caballero, Ignacio, additional, García Cuartero, Beatríz, additional, García-Herrero, María Ángeles, additional, Pascual Marcos, María Jesús, additional, Ramos Amador, José Tomás, additional, Martínez del Río, Carmen, additional, and de Ceano-Vivas La Calle, María, additional

Published
2022
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