Global Regularity for Gravity Unstable Muskat Bubbles Peter Davidson and who don't even pick

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Global Regularity for Gravity Unstable Muskat Bubbles Peter Davidson and who don't even pickIn this paper, we study the dynamics of fluids in porous media governed by Darcy's law: the Muskat problem. We consider the setting of two immiscible fluids of different densities and viscosities under the influence of gravity in which one fluid is completely surrounded by the other. This setting is gravity unstable because along a portion of the interface, the denser fluid must be above the other. Surprisingly, even without capillarity, the circle