How do I select only outer faces?

jwkim Member Posts: 6
Name Dropper First Comment First Anniversary

Hi, Team

I'm writing code for automation in Ansys Mechanical and I need to select only the outer faces, but I am not sure how to approach it.

I would appreciate if you could give me some ideas or point me to some code that allows me to make a named selection of the outer faces.


  • Mike.Thompson
    Mike.Thompson Member, Employee Posts: 279
    First Anniversary First Comment 5 Likes Ansys Employee
    edited February 28

    See this example. It uses code from the Bolt Tools Add On to make this easier. This code is also in the project file as a suppressed python code object in the tree. There are two examples: fully enclosed block and a block that is open on one end.

    #import from the bolt tools add on
    import sys
    BoltToolsDir = ExtAPI.ExtensionManager.GetExtensionByName("BoltTools").InstallDir
    if not BoltToolsDir in sys.path:
    import GeoConnectivityHelper
    GeoConnectivityHelper.Initialize(ExtAPI, Ansys)
    #Use the bolt tools add on module to get the face connectivity from a starting face
    StartFacesNs = ExtAPI.DataModel.GetObjectsByName("StartFaces")[0]
    StopFacesNs = ExtAPI.DataModel.GetObjectsByName("StopFaces")[0]
    ConnectivityMap = GeoConnectivityHelper.FaceConnectivityMap()
    Zones = ConnectivityMap.GetZones()
    for Zone in Zones:
        #Create a new NS to represent the output
        NewNs = Model.AddNamedSelection()
        SelInfo = ExtAPI.SelectionManager.CreateSelectionInfo(SelectionTypeEnum.GeometryEntities)
        SelInfo.Entities = Zone.Faces
        NewNs.Location = SelInfo
        NewNs.Name = "Zone Faces: "+str(i)