If the ideas of continuum mechanics are to be applied to porous solids whose pores are filled with fluids, it is nesessary to take a rather coarse view of such bodies. Essentially we must be able to say that every volume element in the body is simultaneously occupied by particles of the solid and the fluid and that implies that these volume elements must be big enough to embrace many pores.
KeywordsField Equation Porous Material Volume Element Constitutive Relation Incompressible Fluid
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