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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

LATTICE BOLTZMANN MODELING FOR SLIP FLOW AND HEAT TRANSFER OF GASEOUS FLUID IN CONFINED POROUS MEDIA

Get access (open in a dialog) DOI: 10.1615/IHTC16.nmt.023710
pages 7055-7066

Аннотация

The velocity slip and temperature jump at the gas-solid interface in the micro-scale devices is one significant difference compared with that on macro scale, which is caused by the rarefaction effect in the slip regime. In this work, a pore-scale LBM model is established to simulate the gaseous fluid flow and heat transfer in the confined porous media. For the curved boundary, a combined treatment is proposed, which adopts the non-equilibrium extrapolation scheme for the curved boundary and the counter-extrapolation method for macroscopic variables on the curved boundary, respectively. The validation test shows that the present model has superiority in capturing the slip phenomena on the curved boundary. Based on the numerical prediction with the established LBM model, it is found that the flow and heat transfer of gaseous fluid in the confined porous media shows an obvious difference as the gas rarefaction effect is considered in the numerical modeling.