# Coupled pore fluid diffusion and stress analysis

 A coupled pore fluid diffusion/stress analysis: is used to model single phase, partially or fully saturated fluid flow through porous media; can be performed in terms of either total pore pressure or excess pore pressure by including or excluding the pore fluid weight; requires the use of pore pressure elements with associated pore fluid flow properties defined; can, optionally, also model heat transfer due to conduction in the soil skeleton and the pore fluid, and convection due to the flow of the pore fluid, through the use of coupled temperature–pore pressure displacement elements; can be transient or steady-state; can be linear or nonlinear; and can include pore pressure contact between bodies (see Pore fluid contact properties). The following topics are discussed:
 Related Topics Defining an analysis In Other Guides About pore fluid flow properties *SOILS Defining pore fluid expansion Configuring an effective stress analysis for fluid-filled porous media

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