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Non-Conformal Structured Meshing Via Directed Mesher

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Old   November 10, 2020, 11:23
Default Non-Conformal Structured Meshing Via Directed Mesher
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Christopher
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Hello,

I am trying to create a 2D structured mesh for an aerospike nozzle on STAR CCM+ and so far am using a patch mesh through the Directed Mesh tool with Badge for 2D meshing. However, when selecting the patches in the streamwise direction (purple lines), I cannot find a way to create non-conformal boundaries between the patches, meaning that the mesh is far too fine in the region of quiescent air (bottom of image).

I have attached an image of the domain in the patch mesher. The purple lines clearly show that if i wish to refine the mesh in the streamwise direction in the nozzle, this will occur uniformly in the entire y direction. Is it possible to create a non-conformal structured mesh where the cell faces touching at either side of the purple lines do not match up?

Thanks,

Chris

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Old   November 10, 2020, 19:57
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Quote:
Is it possible to create a non-conformal structured mesh where the cell faces touching at either side of the purple lines do not match up?
If you mesh it with separate Directed Mesher Operations, otherwise - it has to be conformal.

Also - keep in mind that Directed Mesher is a buggy piece of ***; once you change any size of any part even by 1 mm - it will delete all your patches and settings wailing that ".. topology has changed ...".
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Old   November 11, 2020, 06:00
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Thank you for your answer. To create this separate Directed Mesh Operation, am I right in saying I would need to create two separate parts and mesh them separately, then, create a boundary to join them?
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Old   November 11, 2020, 06:08
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Quote:
To create this separate Directed Mesh Operation, am I right in saying I would need to create two separate parts and mesh them separately
Yes.

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then, create a boundary to join them?
Create an Interface - to be precise.
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Old   November 11, 2020, 06:37
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Thank you for this
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directed mesh, mesh 2d, non-conformal mesh, refinement, structured grid

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