Validation of a New Velocity-slip Model for Separated Gas Microflows
نویسنده
چکیده
A recently developed high-order velocity-slip boundary condition is validated for gas micro ows, by comparing predictions of the new model against the rst-order slip condition and the direct-simulation Monte Carlo (DSMC) results. Numerical solutions of gas ow through microchannels and backward-facing step geometry are presented. The backwardfacing step geometry is a suitable testbed for studying gas micro ows subject to strong adverse pressure gradients and separation. The new slip boundary condition, based on obtaining the slip information one mean free path away from the surface, results in good agreement with the DSMC for both attached and separated ows.
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