技术支持知识库

Solver Solutions

1264: Fortran 运行时库中的内存泄漏

我在多核处理器上反复运行一个使用 MUMPS 求解器的模型时,发现内存消耗逐渐增加。 请确保您安装了 COMSOL Multiphysics 5.4 最新版本。 安装说明 Windows 下载文件...
版本: 5.4 - 平台: Windows,Linux

1263: MUMPS 求解器在集群仿真过程中崩溃或挂起

当我使用 COMSOL Multiphysics 5.4 版本在集群上运行大型模型时,MUMPS 求解器挂起或崩溃。 Please make sure that your COMSOL Multiphysics 5.4 installation is up to date. Installation...
版本: 5.4 - 平台: Windows,Linux

1262: Improving convergence of transient models

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...
版本: All versions - 平台: All Platforms

1261: 执行网格细化研究

如何对问题求解结果的精度充满信心?如何执行网格细化研究? All of the numerical methods used within COMSOL Multiphysics® discretize the modeling space via a Mesh that serves two purposes....
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1260: What to do when a linear stationary model is not solving

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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1258: Understanding the Fully Coupled vs. Segregated approach and Direct...

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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1257: Solving electromagnetic heating models with high-frequency loads

I 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...
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1255: Reducing the amount of solution data stored in a model

My models contain a lot of solution data, and I do not want my file sizes to get too large, it takes a lot of disk space. What can I do to reduce file size? Will this reduce the time it takes to solve the model? File...
版本: All versions - 平台:

1254: Controlling the Time Dependent solver timesteps

I am solving a transient model and changed the stepsize in the Times: field in the Study Settings, but the solver is still taking exactly the same timesteps. It seems the timesteps that the solver is taking are not...
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1250: Running parametric sweeps, batch sweeps, and cluster sweeps from...

This solution describes how to launch a parametric sweep, a batch sweep, or a cluster sweep simulation in COMSOL Multiphysics® from the command line. Short Summary Model methods are presented as a concept to modify...
版本: All versions - 平台: All Platforms