2007/12/07 by Diego Cordoba, Francisco Gancedo · 1 citation
Mathematics · #math.AP
paper · pdf · doi:10.1007/s00220-008-0587-1
16 pages
arxiv created 2007/12/07 · arxiv updated 2009/12/01
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^∞ norm of the free boundary.