Model set-up is quick, thanks to a number of predefined physics interfaces for applications ranging from fluid flow and heat transfer to structural mechanics and electromagnetic analyses. Material properties, source terms and boundary conditions can all be arbitrary functions of the dependent variables.

Predefined multiphysics-application templates solve many common problem types. You also have the option of choosing different physics and defining the interdependencies yourself. Or you can specify your own partial differential equations (PDEs) and link them with other equations and physics.

COMSOL 4.2a Release Highlights
COMSOL has built a solid reputation of fast-paced innovation for multiphysics simulation and analysis. The new Version 4.2a adds to the long history of successful releases of the flagship COMSOL Multiphysics product suite. By including features that reach new communities of engineers and scientists, COMSOL is creating a tightly-integrated platform for analysis whose breadth and depth is unmatched. Major news in the Version 4.2a release:

Particle Tracing Module Track particles with particle-field interactions for CFD, electromagnetics, acoustics and other applications.
LiveLink™ for Creo™ Parametric Seamless bidirectional CAD integration with the latest design software from PTC™.
Faster and more efficient parametric sweeps Take control over memory usage for large parametric sweep and quickly create response surface plots.
Digital Elevation Map (DEM) import Import topographical surface data and combine with solids for any application such as fluid flow, structural, or electromagnetics.
Image import Import 2D images for material table-lookup based on photographic or scanned data.
Interactive slice and isosurface plots Quick interactive positioning of plot surfaces with slider control.