Forced convection flow over a microsphere |
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Authors: | M A Antar |
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Institution: | (1) Mechanical Engineering Department, KFUPM, Dhahran, Saudi Arabia |
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Abstract: | Forced convection heat transfer characteristics around a microsphere subjected to uniform heat flux boundary condition is
numerically investigated in this study. Moderate to high values of Reynolds number and a wide range of Prandtl number are
considered. The analysis assumes that the continuity assumption is valid and hence the Navier–Stokes equations are solved
for the range of Knudsen number of 0.001 ≤ Kn ≤ 0.1. The appropriate boundary conditions at the surface of the microsphere; the velocity slip and temperature jump are
applied. The effect of the flow parameters: Re, Pr and Kn on the velocity and temperature distribution is presented and hence a better control on the boundary layer thickness can
be achieved in the microscale level. Furthermore, the effect of the controlling parameters on the delay of flow separation,
reduced shear stress, drag coefficient and on the Nusselt number profiles is also presented in the results. |
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Keywords: | |
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