Abstract
In this paper, I begin with the general formulation of mixture theory by Bowen and present the derivation of a minimal set of field equations, constitutive relations, and material parameters suitable for the solutions of meaningful diffusion problems. The specific results are for a single solid and two fluids, and they may be extended to any number of fluids. I allude to the results of three problems, viz. (1) the injection of a fluid into a geological formation saturated with another fluid, (2) the drainage of two dissimilar fluids from a geological formation due to in-situ fluid pore pressures, and (3) the process of squeezing a sponge dry, in order to illustrate the general applicability of the derived theory.
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Chen, P.J. A coupled solid/fluids mixture theory that suffices for diffusion problems. J Elasticity 45, 117–134 (1996). https://doi.org/10.1007/BF00042486
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DOI: https://doi.org/10.1007/BF00042486