is a commercial finite element analysis software. Version 3.5a was released around 2008–2009. Here's what you should know:
Scientists and engineers often need it to open and verify old simulation files that might not convert perfectly to the latest version. Comsol Multiphysics 3.5a Free Download
Since COMSOL is proprietary commercial software, "free downloads" found on unofficial sites are often unsafe or illegal. Legitimate ways to access it include: is a commercial finite element analysis software