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Thermal stratification and suction/injection effects on flow and heat transfer of micropolar fluid due to stretching cylinder
Author(s) -
Mansour M. A.,
Mohamed R. A.,
AbdElaziz M. M.,
Ahmed Sameh E.
Publication year - 2011
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.1449
Subject(s) - nusselt number , mechanics , prandtl number , heat transfer , thermodynamics , dimensionless quantity , heat transfer coefficient , materials science , boundary layer , churchill–bernstein equation , suction , parasitic drag , reynolds number , physics , turbulence
SUMMARY In this paper, a numerical solution of flow and heat transfer in micropolar fluid outside a stretching permeable cylinder with thermal stratification and suction/injection effects. The governing system of partial differential equations is converted to ordinary differential equations by using similarity transformations, which are then solved using numerical technique. The cases of strong concentration of microelement and weak concentration of microelement were considered. Our purpose from this study is to investigate the effects of the governing parameters, namely the suction/injection parameter, thermal stratification parameter, Prandtl number, vortex viscosity parameter and Reynolds number on the velocity profiles, pressure distributions, angular velocity profiles and temperature profiles as well as the skin friction coefficient, dimensionless wall couple stress and the Nusselt number. The numerical results are validated by favorable comparisons with previously published results. The results are shown graphically. The values of the skin friction coefficient, dimensionless wall couple stress and the Nusselt number are presented in tables. Copyright © 2011 John Wiley & Sons, Ltd.