Numerical simulation for separation of multi-phase immiscible fluids in porous media  

作　　者：吴柏志 许友生 刘扬 黄国翔 

机构地区：[1]College of Petroleum Engineering, University of Petroleum, Dongying 257061, China [2]Department of Physics, East China Normal University, Shanghai 200062, China [3]Department of Physics, Zhejiang Normal University, Jinhua 321004, China [4]Department of Mechanical Engineering, The Hongkong Polytechnic University, Hong Kong, China

出　　处：《Chinese Physics B》2005年第10期2046-2051,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 10302018）, the Research Grants Council of the Government of the HKSAR, China （Grant No PolyU5172/020）, and the Natural Science Foundation of Zhejiang Province, China （Grant No M103082）.

摘　　要：Based on a lattice Boltzmann method and general principles of porous flow, a numerical technique is presented for analysing the separation of multi-phase immiscible fluids in porous media. The total body force acting on fluid particles is modified by axiding relative permeability in Nithiarasu＇s expression with an axiditional surface tension term. As a test of this model, we simulate the phase separation for the case of two immiscible fluids. The numerical results show that the two coupling relative permeability coefficients K12 and K21 have the same magnitude, so the linear flux-forcing relationships satisfy Onsager reciprocity. Phase separation phenomenon is shown with the time evolution of density distribution and bears a strong similarity to the results obtained from other numerical models and the flows in sands. At the same time, the dynamical rules in this model are local, therefore it can be run on massively parallel computers with well computational efficiency.Based on a lattice Boltzmann method and general principles of porous flow, a numerical technique is presented for analysing the separation of multi-phase immiscible fluids in porous media. The total body force acting on fluid particles is modified by axiding relative permeability in Nithiarasu＇s expression with an axiditional surface tension term. As a test of this model, we simulate the phase separation for the case of two immiscible fluids. The numerical results show that the two coupling relative permeability coefficients K12 and K21 have the same magnitude, so the linear flux-forcing relationships satisfy Onsager reciprocity. Phase separation phenomenon is shown with the time evolution of density distribution and bears a strong similarity to the results obtained from other numerical models and the flows in sands. At the same time, the dynamical rules in this model are local, therefore it can be run on massively parallel computers with well computational efficiency.

关 键 词：separation of multi-phase immiscible fluids porous media numerical simulation 

分 类 号：O357.3[理学—流体力学]