There are two principal approaches to creating meshes in Ansys Fluent Meshing:
Generate a tetrahedral, hexcore, or hybrid volume mesh from an existing boundary mesh. In this case, you can import a boundary mesh from Ansys Meshing or a third-party mesh generation package. You can import boundary meshes created in CAD/CAE packages by using the appropriate menu item in the > submenu (or the associated text commands), or you can convert them using the appropriate stand-alone grid filter.
Generate a tetrahedral, hexcore, or hybrid volume mesh based on meshing objects from a faceted geometry (from CAD or the .tgf format from Ansys Meshing). In this case, you need to create a conformally connected surface mesh using the object wrapping and sewing operations before generating the volume mesh. You can alternatively use the CutCell mesher to directly create a hex-dominant volume mesh for the geometry (imported from CAD or the .tgf format from Ansys Meshing) based on meshing objects.
When the mesh generation is complete, you can transfer the mesh to solution mode using the
Mode toolbar or the command switch-to-solution-mode. The remaining
operations—such as setting boundary conditions, defining fluid properties, executing the
solution, and viewing and postprocessing the results—are performed in solution mode (see
the User’s Guide for details).