How to Create a Surface with Gap in OnShape?

rohan_singh283
rohan_singh283 Member Posts: 6 ✭
in Community Support
Screenshot 2025-11-21 193314.png

So I have this boundary with three sets of airfoils inside them and I am trying to create a surface wherein this entire boundary acts as the domain and these three airfoils remain as the gap. I have to export this surface to Ansys later on for CFD analysis of these three airfoils so I am having an issue using the Fill command. Can anyone please tell me what should be my ideal workflow to create such type of a surface?

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Best Answers

  • MichaelPascoe
    MichaelPascoe Member Posts: 2,955 PRO
    Answer ✓

    .
    So you just want a flat surface with the airfoils cut out of it?

    Looks like you have a sketch face, you could use Offset surface which will turn your sketch face into a surface.

    .


    RENDERCAD - Photorealistic product rendering.
    CADSharp - Professional CAD + software consulting.

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  • eric_pesty
    eric_pesty Member, pcbaevp Posts: 2,905 PRO
    Answer ✓

    If you have closed regions, you should be able to just select the "outer" area and use an offset surface (set to 0) to create a surface with the airfoil-shaped holes in the middle. If that's what you are trying to do?

Answers

  • MichaelPascoe
    MichaelPascoe Member Posts: 2,955 PRO
    Answer ✓

    .
    So you just want a flat surface with the airfoils cut out of it?

    Looks like you have a sketch face, you could use Offset surface which will turn your sketch face into a surface.

    .


    RENDERCAD - Photorealistic product rendering.
    CADSharp - Professional CAD + software consulting.

    ▚▞▚▞▚▞▚▞▚
  • eric_pesty
    eric_pesty Member, pcbaevp Posts: 2,905 PRO
    Answer ✓

    If you have closed regions, you should be able to just select the "outer" area and use an offset surface (set to 0) to create a surface with the airfoil-shaped holes in the middle. If that's what you are trying to do?

  • rohan_singh283
    rohan_singh283 Member Posts: 6 ✭

    Thanks for the help I was going about the wrong way it seems by using the Fill Command

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