The Porous Media Flow Module Study Availability
All the physics interfaces included with the module have the Stationary and Time Dependent preset studies available. The Heat Transfer in Fractures Interface additionally includes the Thermal Perturbation, Eigenfrequency study to compute eigenmodes and eigenfrequencies of linearized models around an equilibrium steady-state temperature field. Custom studies are also available based on the physics interface.
Studies and Solvers and The Physics Interfaces in the COMSOL Multiphysics Reference Manual