The COMSOL Multiphysics engineering simulation software environment facilitates all steps in the modeling process − defining your geometry, meshing, specifying your physics, solving, and then visualizing your results. 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 Multiphysics version 4.3 establishes COMSOL as the leading innovator in multiphysics simulation for electrical, mechanical, fluid, and chemical applications. Major news in version 4.3 Nonlinear Structural Materials Module Nonlinear material model add-on for the Structural Mechanics and MEMS Modules. Pipe Flow Module Fluid flow, heat and mass transfer, hydraulic transients, and acoustics in pipe and channel networks. Corrosion Module Corrosion and corrosion protection simulations based on electrochemical principles. Mesh selections Create new boundaries and domains for imported meshes. Fast meshing for CAD Fast meshing for imported CAD files and the LiveLink products for CAD. New nonlinear solver New Double Dogleg solver for highly nonlinear simulations and mechanical contact Rotating electrical machinery and automatic coil excitation Extends simulation capabilities for 3D motors, generators and coils of arbitrary shapes.