希薄気体で満たされた多孔質体内の流動の数値シミュレーション

概要

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A rarefied gas flow in a porous medium has been numerically investigated for the slip-flow regime, using a two-dimensional periodic model of porous structure. A macrmoscopically uniform flow is assumed to pass through a collection of square rods placed regularly in an infinite space, where a temperature gradient is imposed perpendicularly to the flow direction. Continuity, momentum and energy equations are solved numerically, using the slip velocity and temperature boundary conditions, to describe the microscopic velocity and temperature fields at a pore scale. The numerical results thus obtained are integrated over a unit structure to determine the effective permeability and the molecular diffusion due to tortuosity. The effects of Knudsen number on the permeability and thermal conductivity are elucidated
一般社団法人日本機械学会の論文
1999-09-25