Existence Theorem in the variational problem for compressible inviscid Fluids.
A variational principle for the nonstationary linear Navier-Stokes equations.
A degenerate parabolic system for three-phase flows in porous media
A classical model for three-phase capillary immiscible flows in a porous medium is considered. Capillarity pressure functions are found, with a corresponding diffusion-capillarity tensor being triangular. The model is reduced to a degenerate quasilinear parabolic system. A global existence theorem is proved under some hypotheses on the model data.
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