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How to create such geometry(topography of volcano based on DEM) and mesh by Ansys products

    • Natali777898
      Subscriber

      Hello everyone,

      I am trying to create mesh for the geometry below

      It is a topography of volcano . I was trying to use Fluent Meshing, ICEM CFD. Nothing is working, i also suppose maybe it is too complicated geometry.

      Can i create such geomtry in space clam or design modeler or any other of ansys products?

    • peteroznewman
      Subscriber
      You are either trying to mesh the air above the surface or the ground below the surface. I'll assume you want to model the airflow.
      The image you show is for an STL file that has six sides, the surface you want and five other sides you don't want.
      In SpaceClaim, on the Facets tab, select all the facets on a side face and hit Delete. Do that for all four sides.
      Now use the Separate button. You will end up with two open Facet surface bodies in the outline. Select the one that is not the surface you want and hit Delete. Now you have a single surface that represents the ground. Use the Check Facets button and repair any defects in this surface using the tools on the Facets tab.
      On the Design tab, create a plane below the lowest point on the ground and sketch a rectangle that is smaller than the size of the ground. Pull that up to a height that represents the air domain.
      Now you can use the ground surface to split the air block. This should have a reasonable chance of being meshed.
      If you have difficulty meshing, you can use the smoothing tools on the Facets tab to make it easier to mesh.
    • Natali777898
      Subscriber
      Thank you so much for your response. But i try to model lava flow on the surface which i attached above. And the problem is that every mesh i am trying to make is non orthogonal. I dont know how to make it using ansys products
    • peteroznewman
      Subscriber
      Please put the STL file into an archive such as a .rar or .7z file format, then attach that file to your reply.
      In your reply, say what version of ANSYS you are using.
    • Natali777898
      Subscriber
      Hello)
      Thank you so much for your help. Please find the attached requested file. I am using ansys 2021 R2
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