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NUMERICAL AND EXPERIMENTAL STUDY OF COMPRESSIBLE GAS FLOW THROUGH A POROUS/FLUID–COUPLED AREA

Volume 21, Numéro 4, 2018, pp. 311-328
DOI: 10.1615/JPorMedia.v21.i4.20
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RÉSUMÉ

Numerical simulations and theoretical investigations of fluid flow and heat transfer in porous/fluid-coupled areas have increased greatly in recent years. Scant research has concentrated on compressible gas flow in porous/fluid-coupled areas. First, an effective experiment method is proposed that can be used to accurately measure the permeability and inertial coefficient of porous media when gas flows at a high speed and high differential pressure. Using the method, the parameters of the non-Darcy flow through polyvinyl formal porous materials were tested in an actual experiment. Additionally, modified governing equations were used to solve the non-Darcy flow in porous media and turbulent flow in compressible air–coupled regimes. A method to determine the source terms for flow in porous media is presented. A robust numerical scheme was used to discretize the equations, and time-dependent boundary conditions were used to treat the boundary conditions. A detailed numerical and experimental investigation of compressible gas flow in a straight, round pipe with porous/fluid-coupled areas and backward- and forward-facing steps is given. The computational results were in strong agreement with the experimental data.

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