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Multiscale Modeling of Fluid Transport in Heterogeneous Materials Using Discrete Boltzmann Methods.


pdf icon Multiscale Modeling of Fluid Transport in Heterogeneous Materials Using Discrete Boltzmann Methods. (491 K)
Martys, N. S.; Hagedorn, J. G.

Materials and Structures, Vol. 35, 650-659, December 2002.

Keywords:

Brinkman equation; Darcy's Law; Lattice Boltzmann; permeability; porous media; parallel computing

Abstract:

The lattice Boltzmann method is a promising approach for modeling single and multicomponent fluid flow in complex geometries like porous materials. Here, we review some of our previous work and discuss some recent developments concerning fluid flow in multiple pore size materials. After presenting some simple test cases to validate the model, results from large scale simulations of single and multi-component fluid flow through digitized Fountaine sandstone, generated by x-ray microtomography will be given. Reasonably good agreement was found when compared to experimentally determined values of permeability for similar rocks. Finally, modification of the lattice Boltzmann equations, to describe flow in microporous materials is described. The potential for modeling flows in other microstructures of interest to concrete technology will be discussed.