## Mesh

### Resolving time-dependent waves

Solution Number: 1118 Applies to: Acoustics Module, COMSOL Multiphysics, MEMS Module, RF Module, Structural Mechanics Module, Wave Optics Module Versions: All versionsI 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, ...

### Setup and Meshing of Infinite Elements, Perfectly Matched Layers, and Absorbing Layers

Solution Number: 1272 Versions: All versionsI am setting up a model where I want to include a region of infinite extent. How should such situations be modeled and meshed? #Overview There are three options for modeling a domain that is meant to represent a ...

### Understanding, and changing, the element order

Solution Number: 1270 Versions: All versionsWhat is the meaning of element order, or discretization, and how do I change it? What affect does it have on the mesh and the solution? Why does the mesh look like it has straight sides even with higher-order ...

### Performing a Mesh Refinement Study

Solution Number: 1261 Versions: All versionsHow 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 ...

### The usage of Form Union and Form Assembly

Solution Number: 1216 Versions: All versionsThere 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 ...

### Manually setup the geometric multigrid solver

Solution Number: 1213 Versions: All versionsThe 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 ...

### Failed to respect edge element on geometry edge

Solution Number: 1207 Applies to: COMSOL Multiphysics Versions: All versionsThe 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 ...

### Failed to respect boundary element on geometry face

Solution Number: 1208 Applies to: COMSOL Multiphysics Versions: All versionsThe 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 ...

### Failed to create boundary layer mesh for domains

Solution Number: 1210 Applies to: COMSOL Multiphysics Versions: All versionsThe 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 ...

### Failed to create boundary layer mesh

Solution Number: 1209 Applies to: COMSOL Multiphysics Versions: All versionsThe 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 ...

## Learning Center Resources

Learn how to use the COMSOL Multiphysics^{®}software for modeling devices, designs, and processes. Access the Learning Center courses and articles below for modeling guidelines, step-by-step demonstrations, and exercise files.