CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2016, Vol. 33 ›› Issue (2): 147-155.

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Lattice Boltzmann Modeling of Non-Newtonian Multiphase Fluid Displacement

XIE Chiyu1, ZHANG Jianying2, WANG Moran1   

  1. 1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
    2. College of Engineering, Peking University, Beijing 100871, China
  • Received:2015-01-01 Revised:2015-07-09 Online:2016-03-25 Published:2016-03-25

Abstract: Non-Newtonian fluid model is introduced into multiphase LBM to investigate non-Newtonian fluid displacement in porous media. To begin with,process of a Newtonian fluid displaced by pseudo-plastic fluid and Newtonian fluid in a simple pore with a small obstacle is studied. It shows that fluid displaced by pseudo-plastic fluid is faster than that by Newtonian fluid. Besides,interface tension effects on displacement process is investigated in detail. It indicates that interface tension plays a resistant role during displacement process. Lower interface tension enhances displacement. By using quartet structure generation set (QSGS) algorithm,we perform a series of modeling of displacement in porous media systems. Impacts of interface tension,wettability and pressure difference on final production are discussed.

Key words: multiphase flow, non-Newtonian fluids, fluid displacement, interface capture, lattice Boltzmann method

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