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Fluid flows of mixed regimes in porous media
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In porous media, there are three known regimes of fluid flows, namely, pre-Darcy, Darcy, and post-Darcy. Because of their different natures, these are usually treated separately in the literature. To study complex flows when all three regimes may be present in different portions of a same domain, we use a single equation of motion to unify them. Several scenarios and models are then considered for slightly compressible fluids. A nonlinear parabolic equation for the pressure is derived, which is degenerate when the pressure gradient is either small or large. We estimate the pressure and its gradient for all time in terms of initial and boundary data. We also obtain their particular bounds for large time which depend on the asymptotic behavior of the boundary data but not on the initial one. Moreover, the continuous dependence of the solutions on initial and boundary data and the structural stability for the equation are established. Published by AIP Publishing.
|Journal Title||Journal of Mathematical Physics|
|Rights||In Copyright (All Rights Reserved); This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Celik, E., Hoang, L., Ibragimov, A., & Kieu, T. (2017). Fluid flows of mixed regimes in porous media. Journal of Mathematical Physics, 58(2), 023102. doi:10.1063/1.4976195 and may be found at https://doi.org/10.1063/1.4976195.|