title: Lattice Boltzmann simulations of binary fluid flow through porous media.
abstract: The lattice Boltzmann equation is often advocated as a simulation tool that is particularly effective for complex fluids such as multiphase and multicomponent flows through porous media. We construct a three-dimensional 19 velocity lattice Boltzmann model for immiscible binary fluids with variable viscosities and density ratio based on the model proposed by Gunstensen. The model is tested for the following binary fluid flow problems: a stationary planar interface among two fluids; channel flow of immiscible binary fluids; the Laplace problem; and a rising bubble. The results agree well with semi-analytic results in a range of the Eötvös, Morton and Reynolds number. We also present preliminary simulation results for two large-scale realistic applications: the flow of an air-water mixture in a waste-water batch reactor and the saturation hysteresis effect in soil flow. We discuss some limitations of the lattice Boltzmann method in the simulation of realistic and difficult multiphase problems.
authors.affiliation: Institut für Computeranwendungen im Bauwesen, Technische Universität Braunschweig, Germany. toelke@inf.bauwesen.tu-muenchen.de
authors.forename: Jonas
authors.initials: J
authors.lastname: Tölke
authors.forename: Manfred
authors.initials: M
authors.lastname: Krafczyk
authors.forename: Manuel
authors.initials: M
authors.lastname: Schulz
authors.forename: Ernst
authors.initials: E
authors.lastname: Rank
mesh_terms: D001692:Biological Transport; D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D007700:Kinetics; D008956:Models, Chemical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D010316:Particle Size; D016062:Porosity; D011312:Pressure; D011789:Quantum Theory; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry*
chemical_list: D003102:Colloids; D012996:Solutions