Abaqus porous media and pore fluid material definitions describe flow, compressibility, saturation, sorption, and swelling behavior in fluid-filled porous materials.
How It Works
The guide lists pore-fluid material properties for coupled pore fluid diffusion and stress analysis. Permeability defines the relation between flow rate and hydraulic or piezometric head gradients. In Abaqus/Standard it can be isotropic, orthotropic, anisotropic, velocity-dependent, and saturation-dependent; in Abaqus/CFD it can also use relations such as Carman-Kozeny and inertial drag.
Porous bulk moduli define the compressibility of solid grains and the permeating fluid. Sorption defines absorption and exsorption under partially saturated flow. Swelling gel and moisture swelling capture saturation-driven volumetric swelling behavior, including anisotropic swelling ratios and consistency requirements for initial saturation and pore pressure.
Why It Matters
Porous media analysis couples mechanical deformation, pore pressure, saturation, and flow. The material data are not just constitutive constants; they control the coupled storage, transport, and deformation response of soils, rocks, gels, and other saturated or partially saturated media.
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