MODELOWANIE PRZEPŁYWU WODY W UTWORACH O PODWÓJNEJ POROWATOŚCI

Abstract

MODELLING OF WATER FLOW IN DOUBLE-POROSITY MEDIAAbstract. Natural soils and rocks often contain two porous systems having different physical properties. The double-porosity structure is related either to the development of a network of secondary porosity (fractures, fissures or macropores) in a microporous matrix or to the presence of lenses or inclusions with the hydraulic conductivity very different from the background material. Since the characteristic time of flow in the two pore systems differs considerably, special models are required for double-porosity media. Such models describe separately the flow in each of the two pore systems. This paper presents the most common double-porosity models and discusses the relationship between them. Special attention is paid to the models obtained by the method of homogenization.