Uplift, friction and capillarity: Three fundamental effects for liquid-saturated porous solids

Abstract In the present paper, the effects of uplift, friction and capillarity for liquid-saturated porous solids are discussed by use of general porous media theories (mixture theories extended by the volume fraction concept). Preceded by several historical remarks on former approaches to a.m. effects, the present investigation is based on a macroscopic binary model of incompressible constituents where, in the constitutive range, use is made of the second-grade character of general heterogeneous media. As a direct consequence of this procedure, the magnitudes of uplift, friction and capillarity effects are easily determined, thus solving an old problem in applied engineering.

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