# Support Knowledge Base

## Mesh Solutions

1261: Performing a Mesh Refinement Study

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 MultiphysicsÂ® discretize the modeling space via a Mesh...
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1216: The usage of Form Union and Form Assembly

There is an option to Form Union or Form Assembly at the end of the Geometry sequence. What does this mean and when should I switch between them? The Geometry branch within the Model Builder consists of a sequence of...
Version: All versions - Platform: All Platforms

1213: Manually setup the geometric multigrid solver

The geometric multigrid solver accelerates the convergence of the iterative solver by solving the finite element problem on a series of meshes rather than a single one. The multigrid algorithm starts with the initial...
Version: All versions - Platform: All Platforms

1210: Failed to create boundary layer mesh for domains

The error "Failed to create boundary layer mesh for domains" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator was...
Version: All versions - Platform:

1209: Failed to create boundary layer mesh

The error "Failed to create boundary layer mesh" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator was not able to...
Version: All versions - Platform:

1208: Failed to respect boundary element on geometry face

The error "Failed to respect boundary element on geometry face" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator...
Version: All versions - Platform:

1207: Failed to respect edge element on geometry edge

The error "Failed to respect edge element on geometry edge" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator...
Version: All versions - Platform:

1206: A degenerated triangle was created

The error "A degenerated triangle was created" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator ran into...
Version: All versions - Platform:

1205: A degenerated tetrahedron was created

The error "A degenerated tetrahedron was created" occurs. First, due to continual improvements in meshing, make sure to use the latest version of COMSOL Multiphysics: Product Download The mesh generator ran into...
Version: All versions - Platform:

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