The Poroelastic Storage node adds Equation 7-2 and Equation 7-17 (excluding any mass sources). Use it to define the fluid and porous media properties, including a storage term to account for the Poroelasticity multiphysics coupling.

This feature requires a specific license. For a detailed overview of the functionality available in each product visit https://www.comsol.com/products/specifications/.

The settings are the same as for the Storage Model node except a gas constant type is not required. There is also an option to define the fluid compressibility.

Select the Compressibility of fluid χf (SI unit: 1/Pa). The default uses values From material as defined by the Fluid material selected. For User defined the default is 4·10−10 1/Pa.

The settings are the same as in the Matrix Properties section under Fluid and Matrix Properties.