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[snappyHexMesh] snappyHexMesh: How to add layers to part of an STL?

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Old   May 14, 2018, 10:59
Post snappyHexMesh: How to add layers to part of an STL?
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Marc
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Hi everyone,

I have an issue with addLayers in snappyHexMesh, I hope you can help me out.

My geometry can be seen in the "geometry" image below.

I wish to add some layers to the inside of the injector (near "Inlet 2"). I have tried to add these layers to the patch but the following happens (see "layers" image)

So I have layers on the interior and exterior of the injector, which I want to avoid as the exterior is not a region of interest.

I have also tried splitting the injector STL geometry into two non-closed surface STLs which define the interior and exterior. In theory, in this way I could specify only the interior patch in addLayers to get what I want. The problem is that this way snappyHexMesh does not build the mesh correctly (i.e. does not detect the two patches) and meshes all the domain with a regular mesh.

So, what could I do? Is the last option I tried possible but I just didn't do it correctly? Or is there some other way to do this?

Thank you!
Solved: splitting the STL was the correct approach

Last edited by Dreoasteh; May 15, 2018 at 05:40.
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