Search

Your search keyword '"Alassar A"' showing total 425 results
Start Over Author "Alassar A"
425 results on '"Alassar A"'

201. Heat conduction from two spheres

Author

B. J. Alminshawy and R. S. Alassar

Subjects
Environmental Engineering, Distribution (mathematics), Exact solutions in general relativity, General Chemical Engineering, Bispherical coordinates, Thermodynamics, SPHERES, Mechanics, Thermal conduction, Nusselt number, Biotechnology, Mathematics
Abstract

An exact solution of heat conduction from two spheres is obtained using the bispherical coordinates system. The two spheres may be of different diameters and may be located at any distance from each other. The solution is given in terms of the temperature distribution and the local and average Nusselt numbers. © 2010 American Institute of Chemical Engineers AIChE J, 2010

Published
2010
Full Text
View/download PDF

202. Modeling and Control of 5DOF Robot Arm Using Supervisory Control

Author

Alassar, Ahmed Zakari, Elaydi, Hatem, and Abuhadrous, Iyad Mohammed

Abstract

Modeling and control of 5 degree of freedom (DOF) robot arm is the subject of this thesis. The modeling problem is necessary before applying control techniques to guarantee the execution of any task according to a desired input with minimum error. Deriving both forward and inverse kinematics is an important step in robot modeling based on Denavit Hartenberg (DH) representation. The main objective of this thesis is to control a robot arm using three controllers to acquire the desired position. Proportional integral derivative (PID) controller is used as a reference benchmark to compare its results with fuzzy logic controller (FLC) and fuzzy supervisory controller (FSC) results. FLC is applied as a second controller because of the nonlinearity in the robot manipulators. We compare the result of the PID controller and FLC results in terms of time response specifications. FSC is a hybrid between the previous two controllers. The FSC is used for tuning PID gains since PID alone performs not satisfactory in nonlinear systems. Hence, comparison of tuning of PID parameters is utilized using classical method and FSC method. Based on simulation results, FLC gives better results than classical PID controller in terms of time response and FSC is better than classical methods such as Ziegler-Nichols (ZN) in tuning PID parameters in terms of time response.

Published
2010

203. Running AUS on Solar Energy

Author

AlAssi, Mohammad, AlAssar, Mohammad, Ghatoura, Rajbir, AlShaikh, Shaikha, Rehman, Fazal, AlAssi, Mohammad, AlAssar, Mohammad, Ghatoura, Rajbir, AlShaikh, Shaikha, and Rehman, Fazal

Abstract

A poster submitted in ENG 207 taught by Dr. David Prescott for the Fall 2013 semester., In this project, we have proposed fitting each building in AUS with Solar Panels to charge up that building during the day, and for non-renewable energy to be distributed only at night when required. By switching over to solar energy, not only will it be beneficial to the environment, but also will prove to be cost effective for the university. This project will discuss the different solar energies, and will prove why the solar panels are the best solution for our campus. The primary concern for the implementation of Solar Panels is the upfront cost. Solar panels will help cut down on electricity costs in the long run. The university would cut down its carbon dioxide emissions which would reduce greenhouse gas in the atmosphere and allow the environment to recover and flourish.

Published
2014

205. Inviscid Flow Past Two Cylinders

Author

Mohamed A. El-Gebeily and R. S. Alassar

Subjects
Physics::Fluid Dynamics, Physics, Flow (mathematics), Inviscid flow, Mechanical Engineering, Line (geometry), Perpendicular, Two-dimensional flow, Streamlines, streaklines, and pathlines, Boundary value problem, Mechanics
Abstract

A simple solution of the problem of inviscid flow past two circular cylinders is presented. The two cylinders may be of different diameters and located at any distance from each other. The solutions of the two main cases, namely, when the flow is perpendicular to the center-to-center line and when the flow is parallel to it (tandem cylinders), lead to a solution of the problem when the flow is in an arbitrary direction.

Published
2009
Full Text
View/download PDF

206. Heat Conduction From Spheroids

Author

R. S. Alassar

Subjects
Materials science, Condensed matter physics, Mechanics of Materials, Mechanical Engineering, Oblate spheroid, Spheroid, Thermodynamics, General Materials Science, Condensed Matter Physics, Thermal conduction, Nusselt number
Published
1999
Full Text
View/download PDF

209. 268 * CEREBRAL EMBOLIZATION DURING TRANSCATHETER AORTIC VALVE IMPLANTATION COMPARED WITH SURGICAL AORTIC VALVE REPLACEMENT

Author

Marjan Jahangiri, Stephen Brecker, David Roy, Aiman Alassar, and Oswaldo Valencia

Subjects
Pulmonary and Respiratory Medicine, medicine.medical_specialty, Aortic valve replacement, Transcatheter aortic, business.industry, medicine.medical_treatment, medicine, Surgery, Embolization, Cardiology and Cardiovascular Medicine, medicine.disease, business
Published
2013
Full Text
View/download PDF

219. Oral Abstract Session: Imaging of the aorta: from the aortic valve to the abdominal aorta * Thursday 8 December 2011, 14:00-15:30 * Location: Kaposvar

Author

Luis M. Gutiérrez, S.-Y. Choi, Saeromi Kim, C. Saenz De La Calzada Campo, I. Lekuona, V. Sanchez Sanchez, Domenico Gruosso, S G Jones, F. Lombera Romero, J.-S. Park, S.-J. Tahk, M.T. Gonzalez-Alujas, Y. Ibanez, G. Zugazabeitia, G.-S. Hwang, Oswaldo Valencia, Hug Cuéllar, J.J. Onaindia, J F Rodriguez-Palomares, S Velasco, C. Granda Nistal, J.-H. Shin, David Garcia-Dorado, J. Chasco, S. Fernandez Casares, D.-Y. Joe, S. Moral Torres, N. Abdulkareem, I Rodriguez Sanchez, M.-H. Yoon, Marjan Jahangiri, B.-J. Choi, J. Montero Cabezas, B. Garcia-Aranda Dominguez, Aiman Alassar, E. Laraudogoitia, A. Forteza Gil, Artur Evangelista, I. Barrio, and Patricia Mahía

Subjects
Aortic valve, medicine.medical_specialty, Aorta, business.industry, Abdominal aorta, General Medicine, medicine.disease, Volumetric measurement, Bicuspid aortic valve, medicine.anatomical_structure, Intramural hematoma, Internal medicine, medicine.artery, Cardiology, Ventricular pressure, Medicine, Radiology, Nuclear Medicine and imaging, In patient, Radiology, Cardiology and Cardiovascular Medicine, business
Published
2011
Full Text
View/download PDF

221. Random Trochoidal Images

Author

Alassar, Rajai S. and Alassar, Rajai S.

Abstract

Interesting images are generated by combining several randomly-generated randomly-colored trochoids. A simple code that generates these images is given.

Published
2008

227. Cooling of a Hot Torus.

Author

Alassar, Rajai S. and Abushoshah, Mohammed A.

Subjects
*TORUS, *TOROIDAL harmonics, *COORDINATES, *HEAT transfer, *BIOT theory (Mechanics)
Abstract

The problem of a hot torus left to cool in a medium of known temperature is studied. We write the governing equation in toroidal coordinates and expand the temperature in terms of a series in the angular direction. The resulting modes in the radial direction are numerically obtained. We consider both isothermal and convective boundary conditions and study the effect of Biot number and aspect ratio on the heat transfer rate. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

228. Minimal access median sternotomy for aortic valve replacement in elderly patients

Author

Tobias Deuse, Christian Detter, Simon Pecha, Y. Alassar, Yalin Yildirim, and Hermann Reichenspurner

Subjects
Pulmonary and Respiratory Medicine, Aortic valve, Male, medicine.medical_specialty, medicine.medical_treatment, Aortic valve replacement, medicine, Humans, Minimally Invasive Surgical Procedures, Stroke, Aged, Retrospective Studies, Aged, 80 and over, Heart Valve Prosthesis Implantation, business.industry, Retrospective cohort study, General Medicine, Minimal Access Sternotomy, medicine.disease, Sternotomy, Surgery, Cardiac surgery, Clamp, medicine.anatomical_structure, Median sternotomy, Cardiothoracic surgery, Limited skin incision, Anesthesia, Aortic Valve, Heart Valve Prosthesis, Female, business, Cardiology and Cardiovascular Medicine, Research Article
Abstract

Background: We report our clinical experience with a approach for aortic valve replacement (AVR) via minimal access skin incision and complete median sternotomy. This approach was used in patients with higher age and multiple comorbidities, facilitating an easy access with short bypass and cross clamp times. It was especially performed in patients asking for an excellent cosmetic result, who did not qualifying for minimally-invasive AVR via partial upper sternotomy. Methods: AVR via minimal-access median sternotomy, was performed in 58 patients between 01/2009 and 11/2011. Intra- and postoperative data including cross clamp time, cardiopulmonary bypass time, mortality, stroke, pacemaker implantation, re-operation for bleeding, ventilation time, ICU and hospital stay, wound infection, sternal dehiscence or fracture and 30 day mortality were collected. Results: Mean patients age was 76.1 +/�9.4 years, 72% were female. Minimal-access AVR could be performed with a mean length of midline skin incision of 7.8 cm. Aortic cross-clamping time was 54.6 +/�6.3 min, cardiopulmonary bypass time 71.2+/�11.3 min and time of surgery 154.1 +/�26.8 min. Re-operation for bleeding had to be performed in 1 case (1.7%). There were no strokes or pacemaker implantations needed. Mean ventilation time was 4.5 h, ICU stay was 2 days and mean length of hospital stay was 6 days. 6 months follow up showed mortality of 0% and no sternal dehiscence or wound infection was observed. Conclusion: Minimal-access AVR via complete median sternotomy can be performed safely,in this elderly patient cohort without adding additional operative risk compared to conventional AVR. By avoidiance of large skin incisions this approach combines excellent cosmetic results with fast surgery time and excellent postoperative recovery.

Published
2013

231. Oral Abstract Session: Imaging of the aorta: from the aortic valve to the abdominal aorta * Thursday 8 December 2011, 14:00-15:30 * Location: Kaposvar

Author

Moral Torres, S., primary, Evangelista, A., additional, Cuellar, H., additional, Gruosso, D., additional, Rodriguez-Palomares, J., additional, Gonzalez-Alujas, M., additional, Gutierrez, L., additional, Mahia, P., additional, Garcia-Dorado, D., additional, Abdulkareem, N., additional, Jones, S., additional, Valencia, O., additional, Alassar, A., additional, Jahangiri, M., additional, Rodriguez Sanchez, I., additional, Chasco, J., additional, Barrio, I., additional, Ibanez, Y., additional, Zugazabeitia, G., additional, Onaindia, J., additional, Velasco, S., additional, Laraudogoitia, E., additional, Lekuona, I., additional, Montero Cabezas, J., additional, Sanchez Sanchez, V., additional, Forteza Gil, A., additional, Fernandez Casares, S., additional, Granda Nistal, C., additional, Garcia-Aranda Dominguez, B., additional, Lombera Romero, F., additional, Saenz De La Calzada Campo, C., additional, Park, J.-S., additional, Kim, S.-M., additional, Joe, D.-Y., additional, Choi, B.-J., additional, Choi, S.-Y., additional, Yoon, M.-H., additional, Hwang, G.-S., additional, Tahk, S.-J., additional, and Shin, J.-H., additional

Published
2011
Full Text
View/download PDF

232. Poster Session 2: Thursday 8 December 2011, 14:00-18:00 * Location: Poster Area

Author

Luo, X., primary, Fang, F., additional, Sun, J., additional, Xie, J., additional, Lee, A., additional, Zhang, Q., additional, Yu, C., additional, Breithardt, O., additional, Schiessl, S., additional, Schmid, M., additional, Seltmann, M., additional, Klinghammer, L., additional, Zeissler, C., additional, Kuechle, M., additional, Daniel, W., additional, Ege, M., additional, Guray, U., additional, Guray, Y., additional, Demirkan, B., additional, Kisacik, H., additional, Kim, S.-E., additional, Hong, J.-Y., additional, Lee, J.-H., additional, Park, D.-G., additional, Han, K.-R., additional, Oh, D.-J., additional, Tufekcioglu, O., additional, Cozma, D. C., additional, Mornos, C., additional, Ionac, A., additional, Petrescu, L., additional, Tutuianu, C., additional, Dragulescu, S. I., additional, Guimaraes, L., additional, Tavares, G., additional, Rodrigues, A., additional, Nagamatsu, C., additional, Fischer, C., additional, Vieira, M., additional, Oliveira, W., additional, Wilberg, T., additional, Cordovil, A., additional, Morhy, S., additional, Muraru, D., additional, Peluso, M., additional, Dal Bianco, L., additional, Beraldo, M., additional, Solda', E., additional, Tuveri, M., additional, Cucchini, U., additional, Al Mamary, A., additional, Badano, L., additional, Iliceto, S., additional, Pizzuti, A., additional, Mabritto, B., additional, Derosa, C., additional, Tomasello, A., additional, Rovere, M., additional, Parrini, I., additional, Conte, M., additional, Lareva, N., additional, Govorin, A., additional, Cooper, R., additional, Sharif, J., additional, Somauroo, J. D., additional, Hung, J. D., additional, Porcelli, V., additional, Skevington, R., additional, Shahzad, A., additional, Scott, S., additional, Lindqvist, P., additional, Soderberg, S., additional, Gonzalez, M., additional, Tossavainen, E., additional, Henein, M., additional, Nciri, N., additional, Saad, H., additional, Nawas, S., additional, Ali, A., additional, Youssufzay, A., additional, Safi, A., additional, Faruk, S., additional, Yurdakul, S., additional, Erdemir, V., additional, Tayyareci, Y., additional, Yildirimturk, O., additional, Memic, K., additional, Aytekin, V., additional, Gurel, M., additional, Aytekin, S., additional, Przewlocka-Kosmala, M., additional, Cielecka-Prynda, M., additional, Mysiak, A., additional, Kosmala, W., additional, Pescariu, S., additional, Cozma, D., additional, Mornos, A., additional, Dragulescu, S., additional, Maurea, N., additional, Tocchetti, C. G., additional, Coppola, C., additional, Quintavalle, C., additional, Rea, D., additional, Barbieri, A., additional, Piscopo, G., additional, Arra, C., additional, Condorelli, G., additional, Iaffaioli, R., additional, Dalen, H., additional, Thorstensen, A., additional, Moelmen, H., additional, Torp, H., additional, Stoylen, A., additional, Augustine, D., additional, Basagiannis, C., additional, Suttie, J., additional, Cox, P., additional, Aitzaz, R., additional, Lewandowski, A., additional, Lazdam, M., additional, Holloway, C., additional, Becher, H., additional, Leeson, P., additional, Radovanovic, S., additional, Djokovic, A., additional, Todic, B., additional, Zdravkovic, M., additional, Zaja-Simic, M., additional, Banicevic, S., additional, Lisulov-Popovic, D., additional, Krotin, M., additional, Grapsa, J., additional, O'regan, D., additional, Dawson, D., additional, Durighel, G., additional, Howard, L., additional, Gibbs, J., additional, Nihoyannopoulos, P., additional, Tulunay Kaya, C., additional, Kilickap, M., additional, Kurklu, H., additional, Ozbek, N., additional, Koca, C., additional, Kozluca, V., additional, Esenboga, K., additional, Erol, C., additional, Kusmierczyk-Droszcz, B., additional, Kowalik, E., additional, Niewiadomska, J., additional, Hoffman, P., additional, Satendra, M., additional, Sargento, L., additional, Lopes, S., additional, Longo, S., additional, Lousada, N., additional, Palma Reis, R., additional, Chillo, P., additional, Rieck, A., additional, Lwakatare, J., additional, Lutale, J., additional, Gerdts, E., additional, Bonapace, S., additional, Molon, G., additional, Targher, G., additional, Rossi, A., additional, Lanzoni, L., additional, Canali, G., additional, Campopiano, E., additional, Zenari, L., additional, Bertolini, L., additional, Barbieri, E., additional, Hristova, K., additional, Vladiomirova-Kitova, L., additional, Katova, T., additional, Nikolov, F., additional, Nikolov, P., additional, Georgieva, S., additional, Simova, I., additional, Kostova, V., additional, Kuznetsov, V. A., additional, Krinochkin, D. V., additional, Chandraratna, P. A., additional, Pak, Y. A., additional, Zakharova, E. H., additional, Plusnin, A. V., additional, Semukhin, M. V., additional, Gorbatenko, E. A., additional, Yaroslavskaya, E. I., additional, Bedetti, G., additional, Gargani, L., additional, Scalese, M., additional, Pizzi, C., additional, Sicari, R., additional, Picano, E., additional, Reali, M., additional, Canali, E., additional, Cimino, S., additional, Francone, M., additional, Mancone, M., additional, Scardala, R., additional, Boccalini, F., additional, Hiramoto, Y., additional, Frustaci, A., additional, Agati, L., additional, Savino, K., additional, Lilli, A., additional, Bordoni, E., additional, Riccini, C., additional, Ambrosio, G., additional, Silva, D., additional, Cortez-Dias, N., additional, Carrilho-Ferreira, P., additional, Jorge, C., additional, Silva-Marques, J., additional, Magalhaes, A., additional, Santos, L., additional, Ribeiro, S., additional, Pinto, F., additional, Nunes Diogo, A., additional, Kinova, E., additional, Zlatareva, N., additional, Goudev, A., additional, Bonanad, C., additional, Lopez-Lereu, M., additional, Monmeneu, J., additional, Bodi, V., additional, Sanchis, J., additional, Nunez, J., additional, Chaustre, F., additional, Llacer, A., additional, Ermacora, D., additional, Peluso, D., additional, Di Lazzari, M., additional, Meimoun, P., additional, Elmkies, F., additional, Benali, T., additional, Boulanger, J., additional, Zemir, H., additional, Clerc, J., additional, Luycx-Bore, A., additional, Velasco Del Castillo, M. S., additional, Cacicedo Fernandez De Bobadilla, A., additional, Onaindia Gandarias, J., additional, Telleria Arrieta, M., additional, Zugazabeitia Irazabal, G., additional, Quintana Raczka, O., additional, Rodriguez Sanchez, I., additional, Romero Pereiro, A., additional, Laraudogoitia Zaldumbide, E., additional, Lekuona Goya, I., additional, Bonello, B., additional, El Louali, E., additional, Fouilloux, V., additional, Kammache, I., additional, Ovaert, C., additional, Kreitmann, B., additional, Fraisse, A., additional, Migliore, R., additional, Adaniya, M., additional, Barranco, M., additional, Miramont, G., additional, Tamagusuku, H., additional, Alassar, A., additional, Sharma, R., additional, Marciniak, A., additional, Valencia, O., additional, Abdulkareem, N., additional, Jahangiri, M., additional, Jander, N., additional, Kienzle, R., additional, Gohlke-Baerwolf, C., additional, Gohlke, H., additional, Neumann, F.-J., additional, Minners, J., additional, Valbuena, S., additional, De Torres, F., additional, Lopez, T., additional, Gomez, J. J., additional, Guzman, G., additional, Dominguez, F., additional, Refoyo, E., additional, Moreno, M., additional, Lopez-Sendon, J. L., additional, Ancona, R., additional, Comenale Pinto, S., additional, Caso, P., additional, Di Salvo, G., additional, Severino, S., additional, Cavallaro, M., additional, Calabro, R., additional, Enache, R., additional, Piazza, R., additional, Roman-Pognuz, A., additional, Popescu, B., additional, Calin, A., additional, Beladan, C., additional, Purcarea, F., additional, Nicolosi, G., additional, Ginghina, C., additional, Savu, O., additional, Rosca, M., additional, Jurcut, R., additional, Serban, M., additional, Dorobantu, L., additional, Donal, E., additional, Mascle, S., additional, Thebault, C., additional, Veillard, D., additional, Hamonic, H., additional, Leguerrier, A., additional, Corbineau, H., additional, Popa, B. A., additional, Diena, M., additional, Bogdan, A., additional, Benea, D., additional, Lanzillo, G., additional, Casati, V., additional, Novelli, E., additional, Popa, A., additional, Cerin, G., additional, Gual Capllonch, F., additional, Teis, A., additional, Lopez Ayerbe, J., additional, Ferrer, E., additional, Vallejo, N., additional, Gomez Denia, E., additional, Bayes Genis, A., additional, Spethmann, S., additional, Schattke, S., additional, Baldenhofer, G., additional, Stangl, V., additional, Laule, M., additional, Baumann, G., additional, Stangl, K., additional, Knebel, F., additional, Labata, C., additional, Garcia Alonso, C., additional, Gual, F., additional, Nunez Aragon, R., additional, Sousa, C., additional, Vasile, A. I., additional, Dorobantu, M., additional, Iorgulescu, C., additional, Bogdan, S., additional, Constantinescu, D., additional, Caldararu, C., additional, Tautu, O., additional, Vatasescu, R., additional, Badran, H., additional, Elnoamany, M. F., additional, Ayad, M., additional, Elshereef, A., additional, Farhan, A., additional, Nassar, Y., additional, Yacoub, M., additional, Costabel, J., additional, Avegliano, G., additional, Elissamburu, P., additional, Thierer, J., additional, Castro, F., additional, Huguet, M., additional, Frangi, A., additional, Ronderos, R., additional, Prinz, C., additional, Van Buuren, F., additional, Faber, L., additional, Bitter, T., additional, Bogunovic, N., additional, Burchert, W., additional, Horstkotte, D., additional, Kasprzak, J. D., additional, Smialowski, A., additional, Rudzinski, T., additional, Lipiec, P., additional, Krzeminska-Pakula, M., additional, Wierzbowska-Drabik, K., additional, Trzos, E., additional, Kurpesa, M., additional, Motoki, H., additional, Hana, M., additional, Marwick, T., additional, Allan, K., additional, Vazquez-Alvarez, M., additional, Medrano Lopez, C., additional, Granja Da Silva, S., additional, Marcos, C., additional, Rodriguez-Ogando, A., additional, Alvarez, M., additional, Camino, M., additional, Centeno, M., additional, Maroto, E., additional, Feltes Guzman, G., additional, Serra Tomas, V., additional, Acevedo, O., additional, Calli, A., additional, Barba, M., additional, Pintos, G., additional, Valverde, V., additional, Zamorano Gomez, J., additional, Marchel, M., additional, Kochanowski, J., additional, Piatkowski, R., additional, Madej, A., additional, Filipiak, K., additional, Hausmanowa-Petrusewicz, I., additional, Opolski, G., additional, Malev, E., additional, Zemtsovsky, E., additional, Reeva, S., additional, Timofeev, E., additional, Pshepiy, A., additional, Mihaila, S., additional, Rimbas, R., additional, Mincu, R., additional, Dulgheru, R., additional, Mihaila, R., additional, Badiu, C., additional, Cinteza, M., additional, Vinereanu, D., additional, Lira, E., additional, Lebihan, D., additional, Monaco, C., additional, Ruiz Ortiz, M., additional, Mesa, D., additional, Delgado, M., additional, Romo, E., additional, Pena, M., additional, Puentes, M., additional, Santisteban, M., additional, Lopez Granados, A., additional, Arizon Del Prado, J., additional, Suarez De Lezo, J., additional, Tsai, W.-C., additional, Shih, J.-Y., additional, Huang, T.-S., additional, Liu, Y.-W., additional, Huang, Y.-Y., additional, Tsai, L.-M., additional, Cho, E., additional, Choi, K., additional, Kwon, B., additional, Kim, D., additional, Jang, S., additional, Park, C., additional, Jung, H., additional, Jeon, H., additional, Youn, H., additional, Kim, J., additional, Rieck, A. E., additional, Cramariuc, D., additional, Lonnebakken, M., additional, Lund, B., additional, Moceri, P., additional, Doyen, D., additional, Cerboni, P., additional, Ferrari, E., additional, Li, W., additional, Goncalves, S., additional, Vinhais De Sousa, G., additional, Almeida, A. G., additional, Hernandez Garcia, C., additional, De La Rosa Hernandez, A., additional, Arroyo Ucar, E., additional, Jorge Perez, P., additional, Barragan Acea, A., additional, Lacalzada Almeida, J., additional, Jimenez Rivera, J., additional, Duque Garcia, A., additional, Laynez Cerdena, I., additional, Arhipov, O., additional, Sumin, A. N., additional, Campens, L., additional, Renard, M., additional, Trachet, B., additional, Segers, P., additional, De Paepe, A., additional, De Backer, J., additional, Purvis, J. A., additional, Sharma, D., additional, Hughes, S. M., additional, Marek, D., additional, Vindis, D., additional, Kocianova, E., additional, Taborsky, M., additional, Yoon, H., additional, Kim, K., additional, Ahn, Y., additional, Chung, M., additional, Cho, J., additional, Kang, J., additional, Rha, W., additional, Ozcan, O., additional, Sezgin Ozcan, D., additional, Candemir, B., additional, Aras, M., additional, Dincer, I., additional, Atak, R., additional, Gianturco, L., additional, Turiel, M., additional, Atzeni, F., additional, Tomasoni, L., additional, Bruschi, E., additional, Epis, O., additional, Sarzi-Puttini, P., additional, Aggeli, C., additional, Poulidakis, E., additional, Felekos, I., additional, Sideris, S., additional, Dilaveris, P., additional, Gatzoulis, K., additional, Stefanadis, C., additional, Roszczyk, N., additional, Sobczak, M., additional, Peruga, J., additional, Krecki, R., additional, Kasprzak, J., additional, Ishii, K., additional, Suyama, T., additional, Kataoka, K., additional, Furukawa, A., additional, Nagai, T., additional, Maenaka, M., additional, Seino, Y., additional, Musca, F., additional, De Chiara, B., additional, Moreo, A., additional, Cataldo, S., additional, Parolini, M., additional, Parodi, O., additional, Bombardini, T., additional, Faita, F., additional, Park, S.-J., additional, Kil, J.-H., additional, Kim, S.-J., additional, Jang, S.-Y., additional, Chang, S.-A., additional, Choi, J.-O., additional, Lee, S.-C., additional, Park, S., additional, Park, P., additional, Oh, J., additional, Cikes, M., additional, Velagic, V., additional, Biocina, B., additional, Gasparovic, H., additional, Djuric, Z., additional, Bijnens, B., additional, Milicic, D., additional, Huqi, A., additional, Klas, B., additional, He, A., additional, Paterson, I., additional, Irween, M., additional, Ezekovitz, J., additional, Choy, J., additional, Chen, Y., additional, Cheng, L., additional, Yao, R., additional, Yao, H., additional, Chen, H., additional, Pan, C., additional, Shu, X., additional, Sobkowicz, B., additional, Kaminska, M., additional, Musial, W., additional, Buechel, R., additional, Sommer, G., additional, Leibundgut, G., additional, Rohner, A., additional, Bremerich, J., additional, Kaufmann, B., additional, Kessel-Schaefer, A., additional, Handke, M., additional, Kiotsekoglou, A., additional, Saha, S., additional, Toole, R., additional, Sharma, S., additional, Gopal, A., additional, Adhya, S., additional, Tsang, W., additional, Kenny, C., additional, Kapetanakis, S., additional, Lang, R., additional, Monaghan, M., additional, Smith, B., additional, Coulter, T., additional, Rendon, A., additional, Cheung, W.-S., additional, Gorissen, W., additional, Ejlersen, J. A., additional, May, O., additional, Van Slochteren, F. J., additional, Van Der Spoel, T., additional, Hanssen, H., additional, Doevendans, P., additional, Chamuleau, S., additional, De Korte, C., additional, Tarr, A., additional, Stoebe, S., additional, Trache, T., additional, Kluge, J.-G., additional, Varga, A., additional, Hagendorff, A., additional, Nagy, A., additional, Kovacs, A., additional, Apor, A., additional, Sax, B., additional, Becker, D., additional, Merkely, B., additional, Lindquist, R., additional, Miller, A., additional, Reece, C., additional, Eidem, B. W., additional, Choi, W.-G., additional, Kim, S., additional, Oh, S., additional, Kim, Y., additional, Iacobelli, R., additional, Chinali, M., additional, D' Asaro, M., additional, Toscano, A., additional, Del Pasqua, A., additional, Esposito, C., additional, Seghetti, G., additional, Parisi, F., additional, Pongiglione, G., additional, Rinelli, G., additional, Omaygenc, O., additional, Bakal, R., additional, Dogan, C., additional, Teber, K., additional, Akpinar, S., additional, Sahin, G., additional, Ozdemir, N., additional, Penhall, A., additional, Joseph, M., additional, Chong, F., additional, De Pasquale, C., additional, Selvanayagam, J., additional, Leong, D., additional, Nyktari, E. G., additional, Patrianakos, A. P., additional, Goudis, C., additional, Solidakis, G., additional, Parthenakis, F., additional, Vardas, P., additional, Nestaas, E., additional, Fugelseth, D., additional, Vitarelli, A., additional, Capotosto, L., additional, Bernardi, M., additional, Conde, Y., additional, Caranci, F., additional, Placanica, G., additional, Dettori, O., additional, Vitarelli, M., additional, De Chiara, S., additional, De Cicco, V., additional, Ferro', M., additional, Calabro', R., additional, Apostolakis, S., additional, Chalikias, G., additional, Tziakas, D., additional, Stakos, D., additional, Thomaidi, A., additional, Konstantinides, S., additional, Iorio, G., additional, Rucos, R., additional, Continanza, G., additional, D Ascanio, M., additional, Alessandroni, L., additional, Saponara, M., additional, Berry, M., additional, Nahum, J., additional, Zaghden, O., additional, Monin, J., additional, Couetil, J., additional, Lairez, O., additional, Macron, L., additional, Dubois Rande, J., additional, Gueret, P., additional, Lim, P., additional, Cameli, M., additional, Giacomin, E., additional, Lisi, M., additional, Benincasa, S., additional, Righini, F., additional, Menci, D., additional, Focardi, M., additional, Mondillo, S., additional, Philip, E., additional, Gorincour, G., additional, Bellsham-Revell, H., additional, Bell, A. J., additional, Miller, O. I., additional, Beerbaum, P., additional, Razavi, R., additional, Greil, G., additional, Simpson, J. M., additional, Ann, S., additional, Kim, T., additional, Lee, J., additional, Chin, J., additional, Cabeza Lainez, P., additional, Escolar Camas, V., additional, Gheorghe, L., additional, Fernandez Garcia, P., additional, Vazquez Garcia, R., additional, Caiulo, V., additional, Caiulo, S., additional, Fisicaro, A., additional, Moramarco, F., additional, Latini, G., additional, Seale, A., additional, Carvalho, J., additional, Gardiner, H., additional, Roughton, M., additional, Simpson, J., additional, Tometzki, A., additional, Uzun, O., additional, Webber, S., additional, Daubeney, P., additional, Dawood, A., additional, Dwivedi, G., additional, Mahadevan, G., additional, Jiminez, D., additional, Steeds, R., additional, Frenneaux, M., additional, Attenhofer Jost, C. H., additional, Knechtle, B., additional, Bernheim, A., additional, Pfyffer, M., additional, Linka, A., additional, Faeh-Gunz, A., additional, Seifert, B., additional, De Pasquale, G., additional, Zuber, M., additional, Tomaszewski, A., additional, Kutarski, A., additional, and Tomaszewski, M., additional

Published
2011
Full Text
View/download PDF

247. The impulsively started flow over oblate spheroids

Author

Hassan M. Badr and R. S. Alassar

Subjects
Drag coefficient, Differential equation, Applied Mathematics, General Mathematics, General Physics and Astronomy, Reynolds number, Geometry, Mechanics, Vorticity, Legendre function, Physics::Fluid Dynamics, Flow separation, symbols.namesake, Flow (mathematics), Stream function, symbols, Mathematics
Abstract

The problem of the impulsively started flow over an oblate spheroid is solved using the series truncation method in which the stream function and vorticity are expanded in terms of series of Legendre functions. The resulting time-dependent differential equations are solved using the Crank-Nicolson finite difference scheme. The parameters involved are the Reynolds number and the axis ratio. The range of Reynolds numbers considered is from 5 to 100 while the axis ratio is considered at values of A r = 0.6 and 0.76. The time variation of the flow field is presented in the form of streamline and equi-vorticity patterns as well as pressure and surface vorticity distributions. The time development of the separation angle, wake length, and the frictional and total drag coefficients are also presented. The large time (steady) values of the drag coefficient for the special case of a sphere are compared with previously known data and the agreement is satisfactory.

Published
1999
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results