Article ID Journal Published Year Pages File Type
4993081 International Communications in Heat and Mass Transfer 2016 7 Pages PDF
Abstract
We investigate heat transfer in a rarefied gas in a lid-driven cavity flow initiated by instantaneously heating and cooling opposite walls for different flow regimes. Volume diffusion model is used as an extension to the standard Navier-Stokes-Fourier set for simulating the flows. Numerical simulations are presented and compared with standard Navier-Stokes-Fourier. For higher Knudsen numbers the volume diffusion model captures non-local equilibrium effects in corners of the cavity that are missed by the Navier-Stokes-Fourier model. It is generally observed that one can use volume diffusion corrections to capture disequilibrium effects in high rarefaction regimes.
Keywords
Related Topics
Physical Sciences and Engineering Chemical Engineering Fluid Flow and Transfer Processes
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