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COMSOL Multiphysics® is package for modeling and simulation of physical phenomena using Partial Differential Equations (PDE) and then solve particular model by FEM analysis. Geometric models is possible to create in COMSOL Multiphysics® environment or import them from other CAD packages. It is possible to simply combine several physical applications (PDEs) in one model by contribution several optional add-ons modules from different professional areas.