If you cannot get a trial or your academic access has expired, several powerful open-source projects offer similar multiphysics capabilities without the licensing fees. 1. FreeCAD (with FEM Workbench)
While a "forever free" version of COMSOL Multiphysics doesn't exist for the general public, the and academic licenses are great ways to get started. If you need a long-term solution without the cost, exploring Elmer or SimScale is your best bet for high-quality multiphysics simulation. comsol multiphysics free
If you are a student or a researcher, you might already have "free" access through your institution. If you cannot get a trial or your
Keep in mind that each of these alternatives has its own strengths and limitations, and may require a significant learning curve. comsol multiphysics free