Converting a 3D mesh to a Dual Domain mesh is useful when modeling inserts where you want to have an exact match between the elements of the part (3D mesh) and the elements of the insert (Dual Domain mesh).
Note: Ensure the 3D mesh of the model does not have any errors.
Change the mesh type of the model to Dual Domain.
Right-click on the meshing icon (second from top) in the Study Tasks pane and select Set Mesh Type.
Select Dual Domain.
Select (Mesh tab > Mesh panel > Generate Mesh).
Select the General tab to view the Target edge length information.
Ensure the Remesh boundary check box is not selected.