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 # SurfaceUtilities

 Last update: 02.04.2026 

<a id="ansys.meshing.prime.SurfaceUtilities"></a>

### *class* ansys.meshing.prime.SurfaceUtilities(model)

Performs various general surface utilities algorithms.

For example, copy zonelets, resolve surface intersections.

**Parameters:**

**model**

Server model to create SurfaceUtilities object.

### Methods

NameDescription[`SurfaceUtilities.add_thickness`](ansys.meshing.prime.SurfaceUtilities.add_thickness.md#ansys.meshing.prime.SurfaceUtilities.add_thickness)(zonelets, params)Add thicknesss to input face zonelets.[`SurfaceUtilities.copy_face_zonelets`](ansys.meshing.prime.SurfaceUtilities.copy_face_zonelets.md#ansys.meshing.prime.SurfaceUtilities.copy_face_zonelets)(...)Copy face zonelets.[`SurfaceUtilities.create_boi`](ansys.meshing.prime.SurfaceUtilities.create_boi.md#ansys.meshing.prime.SurfaceUtilities.create_boi)(...)Create BOI to input face zonelets.[`SurfaceUtilities.create_cap_on_face_zonelets`](ansys.meshing.prime.SurfaceUtilities.create_cap_on_face_zonelets.md#ansys.meshing.prime.SurfaceUtilities.create_cap_on_face_zonelets)(...)Create caps on the given face zonelets.[`SurfaceUtilities.create_contact_patch`](ansys.meshing.prime.SurfaceUtilities.create_contact_patch.md#ansys.meshing.prime.SurfaceUtilities.create_contact_patch)(...)Create a contact patch by offsetting the target zonelets.[`SurfaceUtilities.delete_unwetted_surfaces`](ansys.meshing.prime.SurfaceUtilities.delete_unwetted_surfaces.md#ansys.meshing.prime.SurfaceUtilities.delete_unwetted_surfaces)(...)Delete unwetted surfaces based on material point list.[`SurfaceUtilities.fill_holes_at_plane`](ansys.meshing.prime.SurfaceUtilities.fill_holes_at_plane.md#ansys.meshing.prime.SurfaceUtilities.fill_holes_at_plane)(...)Fill holes in given face zonelets at given plane.[`SurfaceUtilities.fix_invalid_normal_nodes_of_face_zonelets`](ansys.meshing.prime.SurfaceUtilities.fix_invalid_normal_nodes_of_face_zonelets.md#ansys.meshing.prime.SurfaceUtilities.fix_invalid_normal_nodes_of_face_zonelets)(...)Create nuggets to fix invalid normal at nodes of the given face zonelets.[`SurfaceUtilities.get_bounding_box_of_zonelets`](ansys.meshing.prime.SurfaceUtilities.get_bounding_box_of_zonelets.md#ansys.meshing.prime.SurfaceUtilities.get_bounding_box_of_zonelets)(...)Get bounding box of given zonelets.[`SurfaceUtilities.project_topo_faces_on_geometry`](ansys.meshing.prime.SurfaceUtilities.project_topo_faces_on_geometry.md#ansys.meshing.prime.SurfaceUtilities.project_topo_faces_on_geometry)(...)Project nodes of given topofaces on geometry associated to those topofaces.[`SurfaceUtilities.refine_at_contacts`](ansys.meshing.prime.SurfaceUtilities.refine_at_contacts.md#ansys.meshing.prime.SurfaceUtilities.refine_at_contacts)(...)Refine face elements in contact with other parts.[`SurfaceUtilities.resolve_intersections`](ansys.meshing.prime.SurfaceUtilities.resolve_intersections.md#ansys.meshing.prime.SurfaceUtilities.resolve_intersections)(...)Resolve facezonelets intersections.[`SurfaceUtilities.smooth_dihedral_face_nodes`](ansys.meshing.prime.SurfaceUtilities.smooth_dihedral_face_nodes.md#ansys.meshing.prime.SurfaceUtilities.smooth_dihedral_face_nodes)(...)Perform a smoothing operation to eliminate sharp corners at locations where the input face zonelets intersect.[`SurfaceUtilities.stretch_free_boundaries`](ansys.meshing.prime.SurfaceUtilities.stretch_free_boundaries.md#ansys.meshing.prime.SurfaceUtilities.stretch_free_boundaries)(...)Stretch free boundaries of each zonelet.[`SurfaceUtilities.triangulate_face_zonelets`](ansys.meshing.prime.SurfaceUtilities.triangulate_face_zonelets.md#ansys.meshing.prime.SurfaceUtilities.triangulate_face_zonelets)(...)Split faces in zonelets to get triangular faces.