Abstract
We study the well-posedness of a coupled Cahn–Hilliard–Stokes–Darcy system which is a diffuse-interface model for essentially immiscible two phase incompressible flows with matched density in a karstic geometry. Existence of finite energy weak solution that is global in time is established in both 2D and 3D. Weak–strong uniqueness property of the weak solutions is provided as well.
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