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The MUMPS Solver Crashes or Hangs During Cluster Simulation
ソリューション番号: 1263 バージョン: 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
ソリューション番号: 1262 バージョン: すべてのバージョン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
ソリューション番号: 1261 バージョン: すべてのバージョン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
ソリューション番号: 1260 バージョン: すべてのバージョン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
ソリューション番号: 1258 バージョン: すべてのバージョン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 ...
Solving electromagnetic heating models with high-frequency loads
ソリューション番号: 1257 バージョン: すべてのバージョン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 ...
Reducing the amount of solution data stored in a model
ソリューション番号: 1255 バージョン: すべてのバージョン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 ...
Controlling the Time Dependent Solver Timesteps
ソリューション番号: 1254 バージョン: すべてのバージョン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 ...
Solving Wave-Type Problems with Step Changes in the Loads
ソリューション番号: 1244 対応: COMSOL Multiphysics バージョン: すべてのバージョンI am solving a transient model and am expecting the solution to oscillate over time in response to step changes in the loads. How should I set up such a model? What solver changes should I make? Certain models will ...
Running parametric sweeps, batch sweeps, and cluster sweeps from the command line
ソリューション番号: 1250 バージョン: すべてのバージョン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 ...