Meshing Poroelastic Waves Models
Three different waves can propagate in a poroelastic material; fast pressure waves, slow pressure waves, and shear waves. Their speed can be evaluated through the variables pelw.cp_fast, pelw.cp_slow, and pelw.cs_poro, respectively. These should not be confused with the material properties for the constituting solid (pelw.cp and pwel.cs) and the fluid in the pores (pelw.c). These values can be evaluated before solving a model fully, by using the Get Initial Value on the study. Then plot the variables for the wave speeds.
All three poroelastic wave types should be resolved by the computational mesh. This means that the minimum mesh size is given by the wavelength of the slowest wave (the shortest wavelength) divided by 5 to 6. The mesh should of course also resolve geometry details such as highly curved boundaries and narrow regions. In general a mesh convergence study is always recommended.