Flow and Heat Transfer in a Driven Cavity with Two Cylinders

Mixed convection in a lid-driven square cavity with symmetrically placed circular cylinders is studied numerically. The effect of thermal boundary conditions imposed on the two cylinders and the location of the two cylinders on the fluid-flow and heat transfer characteristics within the cavity is st...

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Bibliographic Details
Published in:Journal of thermophysics and heat transfer 2017-01, Vol.31 (1), p.99-108
Main Authors: Khanafer, Khalil, Aithal, S. M, Assad, Mamdouh E, Pop, Ioan
Format: Article
Language:English
Subjects:
Boundary conditions
Circular cylinders
Computational fluid dynamics
Cylinders
Fluid flow
Heat transfer
Holes
Isotherms
Nusselt number
Reynolds number
Richardson number
Walls
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Summary:Mixed convection in a lid-driven square cavity with symmetrically placed circular cylinders is studied numerically. The effect of thermal boundary conditions imposed on the two cylinders and the location of the two cylinders on the fluid-flow and heat transfer characteristics within the cavity is studied for a range of Richardson numbers at a fixed Reynolds number. Detailed analyses of velocity and temperature distributions are presented with isotherms, streamlines, and the local Nusselt number. The effect of the varying Richardson number on the local Nusselt number along the walls of the cavity and the circular cylinders is presented for the different thermal boundary conditions and cylinder locations considered in this work. It is seen that changing the boundary condition on one of the cylinders from isothermal to adiabatic has minimal effect on the distribution of the local Nusselt number on the wall and the hot cylinder. The present results show that the locations of hot and cold cylinders along the vertical direction have a significant effect on streamlines, isotherms, and the local Nusselt number.
ISSN:0887-8722
1533-6808
DOI:10.2514/1.T4744