All Solutions
COMSOL crashes on startup after updating to Debian 10
Solution Number: 1266 Versions: 5.4After updating my Debian installation from Debian 9 to Debian 10, COMSOL crashes on startup. This issue has been observed by some Debian users when updating from Debian 9 to Debian 10. There are two possible solutions ...
Running COMSOL Multiphysics in an IPv6 Environment
Solution Number: 1265 Applies to: COMSOL Multiphysics, COMSOL Server Versions: 6.2I am attempting to install or update COMSOL from an Internet Protocol version 6 (IPv6) environment. I am unable to use online documentation and/or send emails from COMSOL to a IPv6-SMTP server. ##Installation: ...
Memory Leak in the Fortran Runtime Libraries
Solution Number: 1264 Versions: 5.4When running running a model that uses the MUMPS solver repeatedly on my multicore processor, I notice a small gradual increase in Memory Consumption. Please make sure that your COMSOL Multiphysics 5.4 installation is ...
The MUMPS Solver Crashes or Hangs During Cluster Simulation
Solution Number: 1263 Versions: 5.4When running large models on a cluster with COMSOL Multiphysics 5.4, the MUMPS solver hangs or crashes. This issue has been fixed in Update 4 for COMSOL Multiphysics 5.4. Please update your COMSOL installation to ...
Improving Convergence of Transient Models
Solution Number: 1262 Versions: All versionsTransient models involve computing a solution that varies over time. To do so, the software begins with the given initial conditions and computes the evolution of the unknowns using one of several different time ...
Performing a Mesh Refinement Study
Solution Number: 1261 Versions: All versionsHow do I gain confidence in the accuracy of the solution to my problem? How do I perform a mesh refinement study? All of the numerical methods used within COMSOL Multiphysics® discretize the modeling space via a Mesh ...
What to do when a linear stationary model is not solving
Solution Number: 1260 Versions: All versionsI am solving a linear stationary finite element model but the software is not solving. Why? What can I do about this? A linear finite element model is one in which all of the material properties, loads, boundary ...
How can I see the equations COMSOL is defining? How do I implement a user-defined Multiphysics coupling?
Solution Number: 1259 Versions: All versionsI would like to define my own customized coupling between two existing physics interfaces. How can I do this? How can I find the names of the variables that I will need to use? How can I see the names of all ...
Understanding the Fully Coupled vs. Segregated approach and Direct vs. Iterative Linear Solvers
Solution Number: 1258 Versions: All versionsHow, and why, switch between a fully coupled and a segregated approach to solving a multiphysics model? How, and why, switch between the direct and iterative linear system solver? ## Fully Coupled versus Segregated ...
Solving electromagnetic heating models with high-frequency loads
Solution Number: 1257 Versions: All versionsI am solving a Multiphysics problem involving electromagnetics and heat transfer. The electromagnetic fields are varying at a constant frequency, and the period is very short compared to the timespan over which the ...