Before you begin, make sure that you run COMSOL 3.2a. On the Help menu, click "About COMSOL Multiphysics" to check your version. The models are not compatible with COMSOL 3.2; you need COMSOL 3.2a. If you have installed COMSOL 3.2a from the COMSOL 3.2a CD set, the model libraries already include these updated models.

There are five sets of models:

COMSOL Multiphysics Models

Electronic Conductor

This introductory model, which appears in the COMSOL Multiphysics Quick Start and Quick Reference, should include a geometry file, new_soldering_geom.mphbin, which you can use if you want to skip the geometry modeling steps. It is now available for download.

Shallow Water Equations

The updated and corrected Shallow Water Equations model includes artificial stabilization and tighter tolerances for the time stepping.

Sloshing Tank

The updated Sloshing Tank model uses the correct constraints.

Documentation for these models is available in comsolmultiphysics_models32a.pdf.

Chemical Engineering Module Models

Rising Bubble Using Level Sets

A new version of this model includes several improvements for easier modeling and improved accuracy. This version also corrects some errors in the documentation.

The model documentation is available in chemical_engineering_module_models32a.pdf.

Electromagnetics Module Models

Inductance of a Power Inductor

This model shows an inductance calculation on a large 3D geometry using the new higher-order vector elements and memory-efficient iterative solver settings.

The model documentation is available in electromagnetics_module_models32a.pdf.

MEMS Module Models

Microchannel H-Cell

This model makes use of the new predefined multiphysics coupling for flow with species transport to describe a microchannel H-cell for separation through diffusion.

Electroosmotic Biochip

This example models the electroosmotic flow in a DNA chip. The electroosmotic flow in the model couples the electric field to a Stokes Flow application mode at the boundaries. If you want to skip the geometry modeling, use the geomertry in electroosmotic_bio_chip_geom.mphbin.

Thermoelastic Damping in 2D and 3D

Thermoelastic damping is an important factor when designing MEMS resonators.These models show how to model thermoelastic damping in a MEMS resonator using fully coupled thermal and structural equations in both 2D and 3D.

Documentation for all four models is available in mems_module_models32a.pdf.

Structural Mechanics Module Models

In-Plane Truss

The In-Plane Truss example model contains a linear static analysis of a simple 2D pin-jointed truss using the new Truss application mode.

Acoustic-Stucture Interaction

The eigenvalue formulation in the Acoustics application mode now provides second-order eigenvalues. To match the first-order eigenvalues in the Mindlin Plate application mode, the updated model contains some changes to make coupling work correctly in 3.2a.

Coupled Vibrations

The model now uses some simplified settings for the density and the normal acceleration.

Traffic Tunnnel

The updated version of this model shows how to use a Mohr-Coulomb nonlinear material model by making the Drucker-Prager criterion identical to the Mohr-Coulomb criterion. This version also uses more realistic material data and a simplified modeling approach with two application modes instead of three.

Documentation for the In-Plane Truss, Coupled Vibrations, and Traffic Tunnel models is available in structural_module_models32a.pdf. (The COMSOL 3.2a Release Notes contain updated step-by-step instructions for the Acoustic-Structure Interaction model.)

Download either of the self-extracting executable files. Run the executable and unpack the files to your COMSOL installation directory, for example, C:\COMSOL32. This is the directory where the file licenseinfo.txt and the directories comsol and doc are located.

Download either of the tar archives. Unpack the tar archives in the COMSOL installation directory, for example, /usr/local/comsol32 by typing

cd /usr/local/comsol32
tar xf {download directory}/comsolmultiphysics_models32a.tar
tar xf {download directory}/chemical_module_models32a.tar
tar xf {download directory}/electromagnetics_module_models32a.tar
tar xf {download directory}/mems_module_models32a.tar
tar xf {download directory}/structural_module_models32a.tar


If you have installed COMSOL 3.2a from the COMSOL 3.2a CD set, COMSOL is typically installed in /usr/local/comsol32a. The typical Macintosh installation directory is /Applications/COMSOL32a.