Flow and Transport When Scales Are Not Separated: Numerical Analysis and Simulations of Micro- and Macro-Models
Year: 2015
International Journal of Numerical Analysis and Modeling, Vol. 12 (2015), Iss. 3 : pp. 476–515
Abstract
In this paper, we consider an upscaled model describing the multiscale flow of a single-phase incompressible fluid and transport of a dissolved chemical by advection and diffusion through a heterogeneous porous medium. Unlike traditional homogenization or volume averaging techniques, we do not assume a good separation of scales. The new model includes as special cases both the classical homogenized model and the double porosity model, but it is characterized by the presence of additional memory terms which describe the effects of local advective transport as well as diffusion. We study the mathematical properties of the memory (convolution) kernels presented in the model and perform rigorous stability analysis of the numerical method to discretize the upscaled model. Some numerical results will be presented to validate the upscaled model and to show the quantitative significance of each memory term in different regimes of flow and transport.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/2015-IJNAM-499
International Journal of Numerical Analysis and Modeling, Vol. 12 (2015), Iss. 3 : pp. 476–515
Published online: 2015-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 40
Keywords: Upscaled model double-porosity memory terms solute transport non-separated scale stability.