作者机构：
[刘建军] Dept. of Civil Eng., Wuhan Polytech. Univ., Wuhan 430023, China;[胡雅衽; 刘先贵] Inst. of Porous Flow and Fluid Mech., The Chinese Acad. of Sci., Langfang 065007, China
通讯机构：
Dept. of Civil Eng., Wuhan Polytech. Univ., China
期刊：
Journal of Porous Media,1998年1(1):47-55 ISSN：1091-028X
通讯作者：
Kuwahara, F.
作者机构：
[Y. Kameyama; Fujio Kuwahara; S. Yamashita; Akira Nakayama] Shizuoka Univ, Hamamatsu, Japan
通讯机构：
Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Japan
摘要：
Turbulent flowfields within a spatially periodic array were calculated numerically using a finite difference method with a low Reynolds number, two-equation model of turbulence. Exploiting periodic boundary conditions, only a one-structural unit was taken as a calculation domain to simulate a porous medium of regular arrangement in an infinite space. Extensive numerical calculations were carried out for a wide range of Reynolds numbers, to elucidate hydrodynamic behaviors of turbulent flow (post-Forchheimer flow) in porous media. The microscopic numerical results thus obtained at a pore scale were processed to extract the macroscopic hydrodynamic characteristics in terms of the volume-averaged quantities. The macroscopic pressure and flow rate relationship, determined purely from a theoretical basis, has been examined against the existing semiempirical laws, namely, Forchheimer-extended Darcy's law. Thus, departure from Darcy's law resulting from combined non-linear effects of both porous inertia and turbulence on the macroscopic pressure drop has been investigated numerically and correlated with the porosity and Reynolds number.
