- Introduction
- COMSOL Multiphysics
- AC/DC Module
- Acoustics Module
- Batteries and Fuel Cells Module
- CAD Import Module and LiveLink™ Products for CAD
- CFD Module
- Chemical Reaction Engineering Module
- Corrosion Module
- ECAD Import Module
- Electrodeposition Module
- Fatigue Module
- Geomechanics Module
- Heat Transfer Module
- Material Library
- MEMS Module
- Microfluidics Module
- Nonlinear Structural Materials Module
- Optimization Module
- Particle Tracing Module
- Pipe Flow Module
- Plasma Module
- RF Module
- Structural Mechanics Module
- Subsurface Flow Module
- LiveLink™ for MATLAB®
- LiveLink™ for Excel®
- The COMSOL Java API
New Functionality in Version 4.3a
- The Electrostatics physics now supports the Frequency Domain study.
Backward Compatibility vs. Version 3.5a
Change in Dependent Variables
Version 4 has a comprehensive set of inductive formulations based on the magnetic vector potential. These cover all modeling situations except for situations with strongly nonlinear conductivity (superconductors) for which magnetic field H-based formulations are more suitable.
The 2D formulations based on the magnetic field H as dependent variable in version 3.5a are not yet included in version 4.3. A full set (3D, 2D, and 2D axial symmetry) of H-based formulations is planned for a future release.
Models created in version 3.5a that are built using an H-based formulation will not include any physics interface settings when opened in version 4.3. Geometrical data and definitions (constants and expressions) will be imported and the physics can manually be added using the (vector potential-based) Magnetic Fields physics interface.
Pair Boundary Conditions
The Contact Resistance, Transition, and Perfect Magnetic Conductor boundary conditions are not yet available as assembly Pair boundary conditions.
A new set of slit-based, discontinuous boundary conditions, which does not require assemblies is introduced in version 4. In most models, this can replace the assembly pair boundary condition.
