Discussion Forum

I am trying to model a highly viscous resin permeating a bundle of woven fibers, as in a liquid composite molding process. Because there are literally hundreds of individual fibers in each fiber bundle, it is not realistic to simulate each fiber individually. My current solution is to treat the fiber bundle as a porous medium. I also need to model the transient case of the resin permeating through this fiber bundle, which is initially filled with air. This is the case in liquid composite molding processes, where the woven fiber bundles are initially placed in an air-filled mold and then resin is forced into the mold and encapsulates the fibers, pushing all the air out of the mold. My question really boils down to how can I combine the 2-phase flow module (phase-field) with the porous media (Brinkman equation) module within COMSOL? As I understand it, the 2-phase flow module is already coupled with the Navier-Stokes equation. Is there any way to change this and apply the phase-field method to the brinkman equations? If not, are there any alternate recommendations as to how I could simulate this flow situation using COMSOL Ver. 5.2a?