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1127: Improving convergence in nonlinear time dependent models

When solving a time dependent model, I get an error message similar to: Nonlinear solver did not converge. Maximum number of Newton iterations reached. Time : 0.15582918651998362 Last time step is not...
Version: All versions - Platform: All Platforms

1126: Error: Error contacting the update server

When updating the COMSOL model library (see solution 1111), I get the following message: Error contacting the update server Please check your internet connection. If you think your internet connection is fine, you...
Version: All versions - Platform: All Platforms

1123: Error: Failed to connect to AutoCAD

When I synchronize the geometry between AutoCAD LT and COMSOL Multiphysics I get the error message: Failed to connect to AutoCAD. Please make sure AutoCAD is running. AutoCAD LT does not support third party add-ins....
Version: All versions - Platform: Windows

1122: Error: Failed to connect to SOLIDWORKS

When I try to synchronize the geometry between COMSOL and SOLIDWORKS, the error message Failed to connect to SOLIDWORKS. Please make sure SOLIDWORKS is running. is displayed, and the COMSOL Multiphysics tab in...
Version: All versions - Platform: Windows

1118: Resolving time-dependent waves

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,...
Version: All versions - Platform: All Platforms

1116: Selecting hardware for clusters

This knowledge base outlines some hardware recommendations if you plan to set up your own compute cluster for running distributed COMSOL jobs. Depending upon the type of problems that you want to solve you will want to...
Version: All versions - Platform: Windows,Linux

1113: COMSOL does not start with the latest MATLAB version

I have installed a new MATLAB version, but running COMSOL with MATLAB keeps opening the older version of MATLAB. You need to manually update the MATLAB root directory path. In the COMSOL Desktop, go to the Options...
Version: All versions - Platform:

1112: How to recover your work from an interrupted simulation

This knowledgebase describes how to benefit from the recovery feature in COMSOL. This is particularly useful if you have a long computation that for some reason was interrupted at some point, maybe due to system...
Version: All versions,5.3a - Platform: All Platforms

1104: Stabilization schemes in COMSOL

How can I see which stabilization schemes are used by COMSOL Multiphysics in transport physics interfaces such as Single-Phase Flow and Transport of Diluted species? Numerical solutions of transport equations can...
Version: All versions - Platform:

1102: Structural Contact Modeling Guidelines

This article contains guidance for solving models that include structural contact, and the procedures that should be followed to achieve a converged solution. Background Structural contact modeling is a highly...
Version: All versions - Platform: All Platforms