#### Vol. 10, No. 8, 2017

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Incompressible immiscible multiphase flows in porous media: a variational approach

### Clément Cancès, Thomas O. Gallouët and Léonard Monsaingeon

Vol. 10 (2017), No. 8, 1845–1876
##### Abstract

We describe the competitive motion of $N+1$ incompressible immiscible phases within a porous medium as the gradient flow of a singular energy in the space of nonnegative measures with prescribed masses, endowed with some tensorial Wasserstein distance. We show the convergence of the approximation obtained by a minimization scheme á la R. Jordan, D. Kinderlehrer and F. Otto (SIAM J. Math. Anal. 29:1 (1998) 1–17). This allows us to obtain a new existence result for a physically well-established system of PDEs consisting of the Darcy–Muskat law for each phase, $N$ capillary pressure relations, and a constraint on the volume occupied by the fluid. Our study does not require the introduction of any global or complementary pressure.

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