在多孔介质中 ,通过对低速渗流气体的摩阻系数 f与雷诺数Re的实验关系分析得出 ,随着雷诺数减小 ,气体的渗流规律表现出由遵从达西线性关系连续转变为非线性关系 ,其转变所对应的雷诺数 Rec =(1.0 ～ 4.4)× 10 -4 。由动力学分析可知 ,低速渗流气体出现的非线性现象是由气体分子与孔隙壁的作用引起 ,并给出了相应条件下渗流速度V与压力梯度Δp/ΔL的关系 In porous media, the experimental results of friction coefficient f and Reynolds number Re show that as the Reynolds number decreases, the seepage law of gas shows a continuous change from conforming to Darcy’s linearity to non-linear Relationship, the transformation of the corresponding Reynolds number Rec = (1.0 ~ 4.4) × 10 -4. From the kinetic analysis, it can be seen that the non-linear phenomenon of low velocity seepage gas is caused by the action of gas molecules and pore walls, and the relation between the seepage velocity V and the pressure gradient Δp / ΔL under the corresponding conditions