期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 182, 期 2, 页码 622-645出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jcph.2002.7189
关键词
smoothed particle hydrodynamics; convection; diffusion; dispersion; Fickian approximation; porous media
A numerical model using smoothed particle hydrodynamics (SPH) for the simulation of pore-scale hydrodynamic dispersion is presented. The model is used to solve the Taylor dispersion problem and explore the characterization of dispersion as an asymptotic Fickian process. Discrete SPH particle data are analyzed using the method of moments. Simulations for pure tracer convection are used to calculate values of tortuosity and effective porosity for two-dimensional spatially periodic porous media. Tracer convection through such media cannot be described as an asymptotic Fickian-type process, even for large times, if the driving body force F is parallel to a line of media symmetry. If F is not parallel to a line of media symmetry, Fickian-type mixing is possible for tracer convection. An asymptotic Fickian approximation is valid for tracer dispersion through two-dimensional spatially periodic porous media when diffusion effects are included. (C) 2002 Elsevier Science (USA).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据