If you select Physics-controlled mesh in the Sequence type list in the Settings window of a mesh node and build the meshing sequence, COMSOL Multiphysics creates a mesh that is adapted to the current physics interface settings in the model. The default is to use physics-controlled mesh. For example, for a fluid-flow model you get a somewhat finer mesh than the default with a boundary layer mesh along the no-slip boundaries. If you want to modify the overall element size of the physics-induced mesh, select another element size from the Element size list in the Settings window of the main mesh node and rebuild the mesh. If you change the physics interface settings in the model and rebuild the meshing sequence, COMSOL Multiphysics creates a new mesh adapted to the new physics interface settings.

To edit a physics-induced meshing sequence, or to see the errors and warnings of a failing mesh build, select User-controlled mesh in the Sequence type list or right-click the Mesh node and select Edit Physics-Induced Sequence (). The program then adds the nodes under the main Mesh node that together form the physics-controlled mesh.

If you right-click the Mesh node and select Reset to the Physics-Induced Sequence (), the sequence is reset to the physics-induced sequence. However, the type of the sequence is still User-controlled mesh. To switch back to physics-controlled meshing, select Physics-controlled mesh in the Sequence type list in the Settings window of the mesh node. If you add a node to the sequence, the type of the sequence automatically switches to User-controlled mesh.