). It contains physics interfaces for the following sets of equations that apply under different conditions:). It contains physics interfaces for the following sets of equations that apply under different conditions:|
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The Darcy’s Law Interface describes low-velocity flows of one or more fluids.
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The Richards’ Equation Interface governs the wetting and drying of rocks or soils.
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The Two-Phase Darcy’s Law Interface describes two-phase fluid movement through interstices in a porous medium. An extra equation is computed to calculate the saturation transport.
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The Multiphase Flow in Porous Media Interface which combines low velocity flow with phase transport of multiple immiscible phases in a porous medium is described in Chapter Multiphysics Interfaces and Couplings.
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The Fracture Flow Interface is a variant of Darcy’s law that defines the flow along the interior boundaries representing fractures within a porous or solid medium.
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The Brinkman Equations Interface is for porous media high-velocity flows.
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The Free and Porous Media Flow, Brinkman Interface and The Free and Porous Media Flow, Darcy Interface combine free flow adjacent to porous domains.
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The Laminar Flow and Creeping Flow Interfaces use the Navier–Stokes equations (in which the inertia term is neglected in case of Creeping Flow) to describe free flows within a river or well, for example. The Laminar Flow Interface is available with all COMSOL licenses.
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