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COMSOL Multiphysics

The COMSOL Multiphysics simulation environment facilitates all steps in the modeling process — defining your geometry, specifying your physics, meshing, solving and then post-processing your results.

Setting up the model up is quick, thanks to a number of predefined modeling 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.


  • Puhti: 5.5, 5.4


The terms of use of this software allow it to be used only by affiliates (staff and students) of Finnish higher education institutions.


The following modules are currently available:

  • Acoustics
  • AC/DC
  • CAD Import
  • CFD
  • Heat Transfer
  • Particle Tracing
  • Structural Mechanics

The preferred method to use COMSOL interactively is via NoMachine client. With the client, log in to Puhti and allocate computing resources.

$ srun --ntasks=1 --time=00:10:00 --mem=1G --x11=first --pty \
  --account=<project> --partition=small --mail-type=BEGIN \

You have to specify the execution time and memory requirement corresponding your needs. Remember to add your billing project, too. You will get an email notification, when requested computing resources are available. After that you can start COMSOL.

$ module load comsol 


$ comsol

Sometimes, you may encounter errors relating to OpenGL rendering during the launch. The solution is to force COMSOL to start with software rendering using the command

$ comsol -3drend sw

More information

Last edited Thu Nov 26 2020