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Old   July 7, 2019, 10:25
Default GMSH transfinite surface
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Godo afternoon all,

I need to manually create a BL for a vehicle with the nose modelled as an ogive (Bedford Wing and Body)

I am using the OCC engine: I need it since I must use the boolean operation to create the root of the biconvex wing along the cylindrical fuselage.

This ogive is created by extruding by revolution around its longitudinal axis. While trying to create a transfinite recombined mesh over it I get the error message:

.Error : Surface 1 is transfinite but has 1 holes

If I extrude the line to create the ogive by asking to extrude the mesh, I get a structured mesh in the ogive, but this prevents me to apply the transfinite on the cylindrical surface adjacent to the ogive.

Please note that:
1. I tried the Built In engine + surface filling but I was not getting the surface I want
2. I need to create a manual boundary layer from the surface so I would need to have transfinite recombined.
3. I tried with extruding the surface mesh along the normals to create a boundary layer with prisms but this creates conflicts of advancing fronts at the intersection between the wing and the fuselage (in the part after the ogive) and does not give me enough points in the viscous layer.

I am attaching my geo file for clarity.

Looking forward to a kind response.
Many thanks for your help and support
Attached Files
File Type: txt 20190706-bedford.txt (3.6 KB, 7 views)
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Old   May 21, 2022, 22:41
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I am facing the same issue. Where you able to find a solution?
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gmsh, open cascade engine, transfinite

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