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Your search keyword '"Safaei, Reza"' showing total 20 results
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20 results on '"Safaei, Reza"'

8. Effect of flow separation of TiO2 nanofluid on heat transfer in the annular space of two concentric cylinders

Author

Safaei Reza Mohammmad, Nor Adam Mariah, Tuqa Abdulrazzaq, Hussein Togun, Mohd Ariffin Khairol, and Salim Kazi Newaz

Subjects
Pressure drop, re-circulation flow, nanofluids, concentric cylinders, Finite volume method, Materials science, Renewable Energy, Sustainability and the Environment, lcsh:Mechanical engineering and machinery, 020209 energy, abrupt contraction, Reynolds number, 02 engineering and technology, Mechanics, Heat transfer coefficient, Flow separation, symbols.namesake, Nanofluid, Heat flux, Heat transfer, separation flow, 0202 electrical engineering, electronic engineering, information engineering, symbols, lcsh:TJ1-1570
Abstract

In the wake of energy crises, the researchers are encouraged to explore new ways of enhancement in the thermal performance of heat exchanging equipment. In the current research, the SST k-? model and finite volume method were employed to augment heat transfer into the separation flow of TiO2 nanofluid in the annular space of two concentric cylinders. In the present investigation TiO2 nanoparticles of volume fractions, 0.5%-2% at Reynolds number range of 10000-40000, and contraction ratios from 1 to 2 were considered at constant heat flux boundary condition. Simulation results reveal that the highest enhancement in the heat transfer coefficient is corresponding to the annular pipe with a contraction ratio of 2 due to the generated re-circulation flow zone that begins after the separation point on the wall. Further, the surface heat transfer coefficient enhances with the increase of nanoparticles volume fraction and Reynolds number. The velocity distribution profile before and after the steps reveals that increasing the height of the step and Reynolds number, re-circulation regions also increases. Numerical results indicate that the highest pressure drop occurs at the Re = 40000 and contraction ratio of 2.

Published
2020
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9. High Harmonic Generation Driven by Raman Multidimensional Solitary States

Author

Legare, Katherine, primary, Safaei, Reza, additional, Barrette, Guillaume, additional, Arias, Loic, additional, Lassonde, Philippe, additional, Ibrahim, Heide, additional, Vodungbo, Boris, additional, Jal, Emmanuelle, additional, Luning, Jan, additional, Baltuska, Andrius, additional, Jaouen, Nicolas, additional, Legare, Francois, additional, and Fan, Guangyu, additional

Published
2021
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10. Raman Red‐Shift Compressor: A Simple Approach for Scaling the High Harmonic Generation Cut‐Off

Author

Légaré, Katherine, primary, Safaei, Reza, additional, Barrette, Guillaume, additional, Arias, Loïc, additional, Lassonde, Philippe, additional, Ibrahim, Heide, additional, Vodungbo, Boris, additional, Jal, Emmanuelle, additional, Lüning, Jan, additional, Jaouen, Nicolas, additional, Tao, Zhensheng, additional, Baltuška, Andrius, additional, Légaré, François, additional, and Fan, Guangyu, additional

Published
2021
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12. A smoothed particle hydrodynamics approach for numerical simulation of nano-fluid flows

Author

Nasiri, Hossein, Abdollahzadeh Jamalabadi, Mohammad Yaghoub, Sadeghi, Reza, Safaei, Reza, Nguyen, Truong Khang, Shadloo, Mostafa Safdari, Daneshpajoohan Higher Education Institute, Dongguk University (DU), University of Tehran, Ton Duc Thang University [Hô-Chi-Minh-City], Complexe de recherche interprofessionnel en aérothermochimie (CORIA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)

Subjects
Physics::Fluid Dynamics, Nano-fluid, Smoothed particle hydrodynamics (SPH), Weakly compressible, Nanoparticles, Forced convection, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience; Nano-fluidic flow and heat transfer around a horizontal cylinder at Reynolds numbers up to 250 are investigated by using weakly compressible smoothed particle hydrodynamics (WCSPH). To be able to simulate enhanced nanoparticle heat transfer, this manuscript describes for the first time a development that allows conductive and convective heat transfer to be modelled accurately for the Eckert problem using WCSPH. The simulations have been conducted for Pr = 0.01–40 with nanoparticle volumetric concentrations ranging from 0 to 4%. The velocity fields and the Nusselt profiles from the present simulations are in a good agreement with the experimental measurements. The results show that WCSPH is appropriate method for such numerical modelling. Additionally, the results of heat transfer characteristics of nano-fluid flow over a cylinder marked improvements comparing with the base fluids. This improvement is more evident in flows with higher Reynolds numbers and higher particle volume concentration.

Published
2019
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17. Molecular gases for pulse compression in hollow core fibers

Author

Haddad, Elissa, primary, Safaei, Reza, additional, Leblanc, Adrien, additional, Piccoli, Riccardo, additional, Jeong, Young-Gyun, additional, Ibrahim, Heide, additional, Schmidt, Bruno E., additional, Morandotti, Roberto, additional, Razzari, Luca, additional, Légaré, François, additional, and Lassonde, Philippe, additional

Published
2018
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18. Hydrofluorocarbon Gases for Pulse Compression in Hollow Core Fibers

Author

Haddad, Elissa, primary, Safaei, Reza, additional, Leblanc, Adrien, additional, Piccoli, Riccardo, additional, Jeong, Young-Gyun, additional, Ibrahim, Heide, additional, Schmidt, Bruno E., additional, Morandotti, Roberto, additional, Razzari, Luca, additional, Légaré, François, additional, and Lassonde, Philippe, additional

Published
2018
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19. Multiple myeloma: patient outcomes in real‐world practice

Author

Yong, Kwee, primary, Delforge, Michel, additional, Driessen, Christoph, additional, Fink, Leah, additional, Flinois, Alain, additional, Gonzalez‐McQuire, Sebastian, additional, Safaei, Reza, additional, Karlin, Lionel, additional, Mateos, Maria‐Victoria, additional, Raab, Marc S., additional, Schoen, Paul, additional, and Cavo, Michele, additional

Published
2016
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