Looking for some help with non-axis-symmetric nozzle

shang2 · April 11, 2018, 12:26

I've been working on trying to run some simulations on a non-axis-symmetric nozzle that designed. To be precise, the nozzle is a supersonic circular to octagonal nozzle. The step file can be found here (I uploaded to Google Drive because it was too large
to upload to the post. The file was exported from Solidworks, where it had been created with xyz curves and a loft).

I have been trying to use gmsh to generate the mesh for this model. However, I have been having some problems. I am looking for some help to point me in the right direction.

I have done some tutorials I found on Youtube, but cannot figure out how to change my mesh from tetrahedron to block.

Furthermore, my current tetrahedron mesh does not go through when I do gmshToFoam.

Thanks in advance for the help!

clapointe · April 11, 2018, 21:26

In the past I have used snappyHexMesh to create complex boundaries -- have you tried this? There are various tutorials (see eg : https://github.com/OpenFOAM/OpenFOAM.../snappyHexMesh.

Caelan

shang2 · April 11, 2018, 21:57

Thanks for the tip. I have looked into snappyHexMesh, but haven't tried it out myself. I'll give it a go and report back.

April 11, 2018, 12:26	Looking for some help with non-axis-symmetric nozzle	#1
shang2 New Member Join Date: Apr 2018 Location: Ohio, USA Posts: 15 Rep Power: 8	I've been working on trying to run some simulations on a non-axis-symmetric nozzle that designed. To be precise, the nozzle is a supersonic circular to octagonal nozzle. The step file can be found here (I uploaded to Google Drive because it was too large to upload to the post. The file was exported from Solidworks, where it had been created with xyz curves and a loft). I have been trying to use gmsh to generate the mesh for this model. However, I have been having some problems. I am looking for some help to point me in the right direction. I have done some tutorials I found on Youtube, but cannot figure out how to change my mesh from tetrahedron to block. Furthermore, my current tetrahedron mesh does not go through when I do gmshToFoam. Thanks in advance for the help!

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April 11, 2018, 21:26		#2
clapointe Senior Member Join Date: Aug 2015 Posts: 494 Rep Power: 15	In the past I have used snappyHexMesh to create complex boundaries -- have you tried this? There are various tutorials (see eg : https://github.com/OpenFOAM/OpenFOAM.../snappyHexMesh. Caelan

April 11, 2018, 21:57		#3
shang2 New Member Join Date: Apr 2018 Location: Ohio, USA Posts: 15 Rep Power: 8	Thanks for the tip. I have looked into snappyHexMesh, but haven't tried it out myself. I'll give it a go and report back.