POROUS Media inside a pipe geometry creation
 

Hello everyone. I have started to work on CFD simulation using ANSYS, for my Project on CFD Simulation of CO2 capture using solid sorbents. I have been facing some problems with regard to creating "POROUS" Geometry ( a pipe with a porous packing inside it) . I would like to request you folks to either provide me with the instruction for creating "POROUS" geometry on Design Modeler and if possible provide me the geometry for the same in ANSYS readable format .