The log window in COMSOL Multiphysics is unreadable on my Linux computerSolution Number: 1287 Versions: All versions
The Log window in my COMSOL Multiphysics sessions looks like this: This issue is most commonly observed on Ubuntu 20.04 LTS (Focal Fossa) when the package texlive-fonts-recommended is present. But it has been ...
Is COMSOL 5.5 Supported on Cray Clusters?Solution Number: 1276 Versions: All versions
COMSOL Multiphysics version 5.5 supports distributed memory computing on Cray clusters. We have verified that COMSOL Multiphysics version 5.5 runs in distributed mode on the Cray XC40 under CLE 7.0. We have tested that ...
Thread placement on >64 logical cores on WindowsSolution Number: 1275 Versions: 5.5
On Windows computers with more than 64 logical cores (e.g. with more than 32 physical cores and Hyperthreading enabled as recommended) thread placement for COMSOL Multiphysics or COMSOL Server can be inefficient. You ...
Resolving time-dependent wavesSolution Number: 1118 Applies to: Acoustics Module, COMSOL Multiphysics, MEMS Module, RF Module, Structural Mechanics Module, Wave Optics Module Versions: All versions
I am solving a time-dependent wave-type problem, what mesh and solver settings should I adjust for better accuracy and runtimes? The accuracy of a time-dependent model solving for electromagnetic, acoustic, ...
Solving complicated modelsSolution Number: 1267 Versions: All versions
I have a large, complicated, model that is not solving, or taking a long time to solve. What should I do? There are a number of reasons why a model may not be solving, or solving very slowly. This article describes ...
Memory leak in the Fortran Runtime LibrariesSolution Number: 1264 Versions: 5.4
When 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 SimulationSolution Number: 1263 Versions: 5.4
When 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 modelsSolution Number: 1262 Versions: All versions
Transient 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 StudySolution Number: 1261 Versions: All versions
How 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 solvingSolution Number: 1260 Versions: All versions
I 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 ...
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Learning Center ResourcesLearn how to use the COMSOL Multiphysics® software for modeling devices, designs, and processes. Access the Learning Center courses and articles below for modeling guidelines, step-by-step demonstrations, and exercise files.
Examples of the General Extrusion Operator
Examples of the General Projection Operator
Integrating Along Streamlines and Extracting Particle Statistics
Copying and Reusing Boundary Mode Analysis Results
Modeling TEM and Quasi-TEM Transmission Lines
Examples of the withsol Operator
Applying Translations, Scaling, Reflection, and Rotation via the Deformed Geometry and Moving Mesh Interfaces