Abstract
Three-dimensional numerical simulation has been conducted to determine the permeability, Forchheimer coefficient, thermal dispersion coefficient and interfacial heat transfer coefficient within packed bed in porous medium. A macroscopically uniform flow is assumed to pass through a collection of spheres placed regularly in an infinite space, where a temperature gradient is imposed to flow direction. Due to the periodicity of the model, only one structural unit can be taken for a calculation domain to resolve an entire domain of porous medium. The numerical results thus obtained are integrated over a unit structure to determine the permeabilty and dispersion coefficient. These macroscopic values agree well with empirical Ergun equation and Wakao-Kaugei equation.
