Water Migratory Model and Numerical Simulation Considering Influence of Coupled Hydro-mechanical Processes in Dual Porosity Media
In numerical modeling of fracture-matrix flow,the fully upstream weighting scheme isroutinely used to estimate flow mobility at the fracture-matrix interface,as a result,the fracture relativepermeability is commonly selected in estimating such mobility when local flow is towards the matrix．However. This scheme has a physically flaw. To overcome the limitation of the scheme, based on theprinciple that the capillary pressure is continuous at the fracture-matrix interface,and the assumptionmat there is instantaneous local equilibrium in pressure on the matrix surface between fracture andmatrix systems,a modified upstream weighting scheme select appropriate mobility for fracture-matrixinteraction based on the flux sign at the surface of matrix is proposed,which is physically correct. Theproposed approach was implemented into dual porosity media model to calculating flow betweenfractures and the rock matrix,and considering influence of coupled hydro-mechanical processessimultaneously,developed a model for describing the transportation and transformation of water infractured porous media,and the numerical scheme is given. The approach could be used for thesimulation of water transport in dual porosity media,and predicts the temporal and spatial distributionfeatures of saturation. In the end,there is a numerical example used to validate the rationality of thismodel．
upstream weighting scheme dual porosity media coupled hydro-mechanical processes contaminant transport numerical model
ZHOU Junping XIAN Xuefu LI Xiaohong
Key Laboratory for the Exploitation of Southwestern Resources&the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing, P.R.China, 400030
国际会议
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
武汉
英文
284-291
2009-04-26（万方平台首次上网日期，不代表论文的发表时间）