A feature that allows users to stitch together a Semi-Structured domain is available in CFD-GEOM.  This feature gives the user the flexibility of stitching two end faces with different topologies, i.e. a geometry that cannot be extruded.

You can find the Semi-structured Domain option on the Mesh tab under the “Shell and Unstructured Domain” options.

Figure 1.  Semi-structured domain tool on the Mesh tab

To create a Semi-structured Domain, you will first need to create the following:

• A primary surface with a surface mesh
• A target surface onto which the surface mesh from the primary surface will be mapped
• A set of closed structured faces

Figure 2.  Simple channel model with differently shaped ends

NOTE: The primary and target surfaces must be created using edges, not lines/curves.

To create a Semi-structured Domain do the following:

1. Select the Semi-structured Domain tool
2. Select the primary surface with a surface mesh (surface mesh is required)
3. Select the target Surface (no surface mesh is required)
4. Select the closed collection of Faces that connect the Primary and the target surface together
5. Press the Middle mouse Button

Figure 3.  Prismatic stitched mesh of a semi-structured domain

If you have any questions about this topic or would like us to discuss other topics in the future, please let us know.

Regards,
ESI CFD Support Team