Micro-scale cavities in the slip - and transition - flow regimes

Mizzi, Simon and Emerson, David R. and Stefanov, Stefan K. and Barber, Robert W. and Reese, Jason M. (2006) Micro-scale cavities in the slip - and transition - flow regimes. In: Computational Micro and Nanofluidics Conference (ECCOMAS CFD), 2006-09-01.

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    Abstract

    Differences between Navier-Stokes-Fourier (NSF) slip/jump solutions and direct simulation Monte-Carlo (DSMC) computations are highlighted for a micro lid-driven cavity problem. The results indicate a need for better modelling techniques which at the same time retain low computational cost of NSF models. We also highlight the fact thatmany micro-flows that have been considered are simple planar flows and typical classification systems are defined on such flows. We show that for complex flows, such as thedriven cavity, non-equilibrium effects are more appreciable and their onset occurs at lower Knudsen numbers than expected.