About pore fluid flow properties

Abaqus/Standard allows specific properties to be defined for a fluid-filled porous material. This type of porous medium is considered in a coupled pore fluid diffusion/stress analysis (Coupled pore fluid diffusion and stress analysis).

The following topics are discussed:

The following properties are available:

Permeability

Permeability defines the relationship between the flow rate of a liquid through a porous medium and the gradient of the piezometric head of that fluid (see Permeability).

Porous bulk moduli

The bulk moduli of the solid grains and of the fluid in a porous medium are defined such that their compressibility is considered in an analysis (see Porous bulk moduli).

Sorption

Sorption defines the absorption/exsorption behavior of a porous material under partially saturated flow conditions (see Sorption).

Swelling gel

The swelling gel model is used to simulate the growth of gel particles that swell and trap wetting liquid in a partially saturated porous medium (see Swelling gel).

Moisture swelling

Moisture swelling defines the saturation-driven volumetric swelling of a porous medium's solid skeleton under partially saturated flow conditions (see Moisture swelling).

Thermal expansion

For porous media such as soils or rock, the thermal expansion of both the solid grains and the permeating fluid can be defined. See Thermal expansion for more details.