Ansys Meshing – CutCell
Written by cfd.ninja
Source: Ansys
CutCell meshing is a general purpose hex-dominant meshing technique. The CutCell meshing algorithm is suitable for a large range of applications, and due to the large fraction of hex cells in the mesh, often produces better results than regular tetrahedral meshes. This method can be used instead of tetrahedral or hexcore meshing, without requiring a very high quality surface mesh as a starting point. Also, this method uses a direct surface and volume approach without the need of cleanup or decomposition, thereby reducing the turnaround time required for meshing.
The CutCell meshing process involves the following approach:
- Objects, material points (optional), and size functions are defined.
- The initial size of the Cartesian grid is computed based on the minimum and maximum size set for the size functions.
- A uniform Cartesian grid is created within the bounding box for the geometry.
The base size for the Cartesian grid is computed from the minimum and maximum size specified in the Size Functions dialog box as follows:
Base Size = 2n × Min Size
such that
Base Size ≤ Max Size
where n is the number of refinement levels.
In this tutorial, you will learn to use the CutCell tool using Ansys Meshing. This mesh is enabled in Ansys Fluent and allows to refine it in a structured way.
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The MultiZone mesh method provides automatic decomposition of geometry into mapped (sweepable) regions and free regions. When the MultiZone mesh method is selected, all regions are meshed with a pure hexahedral mesh if possible.
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