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In membrane distillation (MD) and gas permeation (GP) processes, a general equation given by dusty gas model (DGM) is often used for gas flux through porous media. However, several discrepancies were found in fitting experimental data with the DGM equation. An assumption based on the fact that gas is a compressible viscous fluid is introduced in a modified DGM equation (MDGM). Polytropic equation...
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