База знаний

Is COMSOL 5.5 Supported on Cray Clusters?

Номер решения: 1276 Версии: Все версии

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 ...

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Thread placement on >64 logical cores on Windows

Номер решения: 1275 Версии: Все версии

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 ...

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Resolving time-dependent waves

Номер решения: 1118 Область применения: Acoustics Module, COMSOL Multiphysics, MEMS Module, RF Module, Structural Mechanics Module, Wave Optics Module Версии: Все версии

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, ...

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Solving complicated models

Номер решения: 1267 Версии: Все версии

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 ...

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Memory leak in the Fortran Runtime Libraries

Номер решения: 1264 Версии: 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 ...

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The MUMPS solver crashes or hangs during Cluster Simulation

Номер решения: 1263 Версии: 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 ...

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Improving convergence of transient models

Номер решения: 1262 Версии: Все версии

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 ...

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Performing a Mesh Refinement Study

Номер решения: 1261 Версии: Все версии

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 ...

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What to do when a linear stationary model is not solving

Номер решения: 1260 Версии: Все версии

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

Номер решения: 1258 Версии: Все версии

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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