A maximum principle for the Muskat problem for fluids with different densities

Details A maximum principle for the Muskat problem for fluids with different densities A maximum principle for the Muskat problem for fluids with different densities

2007-12-07

arxiv.org/abs/0712.1090v1

Mathematics

Analysis of PDEs

16 pages

Scientific paper

10.1007/s00220-008-0587-1

We consider the fluid interface problem given by two incompressible fluids with different densities evolving by Darcy's law. This scenario is known as the Muskat problem for fluids with the same viscosities, being in two dimensions mathematically analogous to the two-phase Hele-Shaw cell. We prove in the stable case (the denser fluid is below) a maximum principle for the $L^\infty$ norm of the free boundary.

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