External FEM Acoustics workflow creates external acoustic sound radiation domain to predict the propagation of radiated sound in the near field and far field due to vibration of the external surface of the structural assembly or flow source port of the fluid flow.
External FEM Acoustics workflow can create different domain shape as per your requirement. The available options are Convex Irregular Shape Enclosure (Irregular Body Fitted Convex), External Part Enclosure (custom domain shape through imported CAD file), Spherical Enclosure, Hemispherical Enclosure. All mesh domains have the option to create near field acoustic domain mesh which is enough for radiation or infinite element boundary condition. You also have the option to add Perfectly Matched Layers (PML) to define PML boundary condition.
When you select Mesh Workflows as External FEM Acoustics, Mesh Workflow loads a predefined template with Steps and Outcomes. Mesh Workflow performs the Steps through Controls and Outcomes to achieve the desired mesh for the External FEM Acoustics.
External FEM Acoustics workflow has the following steps:
Note: You can add or delete Extrude PML Region as per your requirement.