Abstract
This paper is focused on the generalized Forchheimer flows of slightly compressible fluids in porous media. They are reformulated as a degenerate parabolic equation for the pressure. The initial boundary value problem is studied with time-dependent Dirichlet boundary data. The estimates up to the boundary and for all time are derived for the L∞-norm of the pressure, its gradient and time derivative. Large-time estimates are established to be independent of the initial data. Particularly, thanks to the special structure of the pressure’s nonlinear equation, the global gradient estimates are obtained in a relatively simple way, avoiding complicated calculations and a prior requirement of Hölder estimates.
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Dedicated to Professor Duong Minh Duc with gratitude
Supported by NSF grant DMS-1412796
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Hoang, L., Kieu, T. Global estimates for generalized Forchheimer flows of slightly compressible fluids. JAMA 137, 1–55 (2019). https://doi.org/10.1007/s11854-018-0064-5
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DOI: https://doi.org/10.1007/s11854-018-0064-5