Mechanics in Engineering ›› 2010, Vol. 32 ›› Issue (4): 12-17.DOI: 10.6052/1000-0879-lxysj2009-404

• Application study • Previous Articles     Next Articles

NUMERICAL SIMULATION OF RELATIONSHIP BETWEEN HYDRAULIC CONDUCTIVITY AND POROSITY SIZE FOR POROUS GEOTECHNICAL MATERIALS

李守巨,刘迎曦,孙伟 and 吴金花   

  • Received:2009-10-12 Revised:2009-11-02 Online:2010-08-08 Published:2010-08-20

Abstract: The relationship between hydraulic conductivity of a porous material and its number-size is simulated by using the finite element method. The solid matrix and the pore space are generated randomly according to the material porosity, and the material parameters and the element properties are assigned by the ANSYS parameter design language. The equivalent hydraulic conductivity is computed according to the flow flux through some section computed by FEM and Darcy law, and the relationship between the equivalent hydraulic conductivity and the porosity number-size of porous materials is obtained. The numerical simulation shows that the equivalent hydraulic conductivity is directly proportional to the square of the porosity size while the porosity is constant, for which the proposed conclusion agrees well with empirical expressions. The equivalent hydraulic conductivity is directly proportional to the porosity while the porosity size is constant.

Key words: equivalent hydraulic conductivity, porosity size, porous material, ANSYS parameter design language, FEM simulation