A THERMODYNAMIC CONTAMINANT TRANSPORT MODEL BASED ON HYBRID MIXTURE THEORY
Contaminant transport in saturated deforming porous media is a multi-field coupling problem. It is related to concentration field, deformation field, even temperature field and so on. In this paper a contaminant transport system is modeled as a superposition of one compressible solid continuum and fluid phase which contains miscible N components. The thermo-hydro-mechanical framework of contaminant transport is developed based on hybrid mixture theory. For taking account of compressibility of solid phase, volume fraction of fluid as an independent state variable is introduced in free energy function of fluid phase, and the dynamic compatibility condition is obtained to restrict the change of pressure difference on solid and fluid interface. According to near equilibrium theory and a formal linearization of the above framework, a linear model of multi-component contaminant transport in deforming porous media is obtained. The model established in this paper is developed from an axiomic system, which is tight and scientific. When the proposed model is supposed to be the single component fluid saturated porous media, it will be reduced to Biotas poroelasticity model.
LU HUANG CHENGGANG ZHAO
Department of Civil Engineering & Architecture Beijing Jiaotong University, China, 100044
国际会议
三亚
英文
25-32
2009-05-24（万方平台首次上网日期，不代表论文的发表时间）