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Mesh refinement for downward facing step with gmsh

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Old   October 21, 2022, 02:37
Default Mesh refinement for downward facing step with gmsh
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Hello everyone,

I am a new user of gmsh3. I would like to mesh a downward facing step with structured cells. The black and white mesh (mesh.png) is similar to the one a manage to do. However, the downstream of the step edge should be meshed with fine cells and the fine area mesh is expanded in the downstream following a triangle shape as seen on the attached picture with colors (grid-plot.jpg).

I managed to perform progressing mesh in the x (streamwise direction) and y (wall normal direction) directions with constant mesh progression. However, I do not succeed in having a mesh progression in the y direction that depend on the x direction (which permit obtaining the triangular shape of fine mesh region). How can I do that with gmsh3 ?

Thanks a lot,
Attached Images
File Type: jpg grid-plot.jpg (113.3 KB, 15 views)
File Type: png mesh.png (19.4 KB, 9 views)
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gmsh, mesh 2d, refinement, structured grid, transfinite surface

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