Solver

Is COMSOL 5.5 Supported on Cray Clusters?

Número da Solução: 1276 Versões: Todas as versões

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 Windows

Número da Solução: 1275 Versões: 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 waves

Número da Solução: 1118 Aplica-se a: Acoustics Module, COMSOL Multiphysics, MEMS Module, RF Module, Structural Mechanics Module, Wave Optics Module Versões: Todas as versões

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 models

Número da Solução: 1267 Versões: Todas as versões

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 Libraries

Número da Solução: 1264 Versões: 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 Simulation

Número da Solução: 1263 Versões: 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 models

Número da Solução: 1262 Versões: Todas as versões

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 Study

Número da Solução: 1261 Versões: Todas as versões

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 solving

Número da Solução: 1260 Versões: Todas as versões

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 ...


Understanding the Fully Coupled vs. Segregated approach and Direct vs. Iterative linear solvers

Número da Solução: 1258 Versões: Todas as versões

How, 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 ...


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Learning Center Resources

Learn 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.