Abstract
In this paper, we study numerically the effects of axial wall conduction and rarefaction in parallel plates microchannel. The simultaneously developing laminar flow with a constant heat flux (H2) boundary condition will also be considered. The finite volume method is used to solve the two-dimensional Navier–Stokes and energy equations, with slip velocity and temperature jump boundary implemented at the fluid/solid interface. The results obtained by our computer code are compared to the analytical results found in the literature. For different Knudsen number Kn, thermal conductivity ratio K and dimensionless thickness E, the influence of axial conduction is demonstrated for Kn=0, especially for large values of K and E. Concerning slip-flow, the effect of axial conduction proved to be negligible for all values of K and E.
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