Porous materials are usually associated with natural objects such as rocks and soils, as well as with biological tissues, foams, ceramics, and paper products.

Poroelastic models describe the interaction between fluid motion and deformation in the porous media. For example, if pumping significantly reduces pore fluid pressures, the material shifts due to the increased load. Modeling poroelasticity involves the coupling between Darcy’s law, which describes the fluid flow in porous
media, with equations for structural displacement. These two laws of physics can be coupled by
means of Biot's constitutive equations.

Failure of a Multilateral Well

This model analyzes the compaction of an oil reservoir brought about by pumping. The animation shows a particle tracing plot of the fluid flow in the porous medium. The boundary color plot shows the displacement, illustrating the fact that maximum displacement occurs where the legs merge.