To enable this option in the context menu, click the Show More Options button () and select Multigrid Level in the Show More Options dialog box. Then right-click any of the Study Step nodes to add a Multigrid Level () node, which specifies the geometric multigrid (GMG) level used by the study. Multigrid levels are only used with the GMG solver, and you can set up a manual multigrid mesh hierarchy using Multigrid Level nodes when you want to control what the GMG solver is using and if you want to deviate from the automatic multigrid mechanisms. One such case is when the coarser (or finer) meshes generated are not of good enough quality. You can then use user-defined meshes in the multigrid mesh hierarchy. See Multigrid and The Geometric Multigrid Solver with Several Meshes for more information.

Select a Physics interface. In the Discretization list, you can specify which discretization to use (defined in the main physics interface’s Settings window or in any added Discretization node; see Discretization (Node)). Changing the discretization can affect the discretization order used by this study. You have to add the discretization you want to use in the physics interface.

Select a mesh to use for each geometry in the study. First select the Geometry from the list and then select the Mesh from the list.