[snappyHexMesh] Meshing Airfoil sections using SHM

Rakkiran · February 1, 2019, 09:42

Hello Foamers,
I am simulating a VAWT with a NACA0018 profile. I modeled it in ICEM and meshing is done using SHM but always the mesh is very bad.
I cleaned the exported stl file in blender for getting a waterproof stl but got some bad mesh results. Also tried few python scripts which i got online in blender for modeling NACA profile but even that didn’t give a good result.
I tried Salome where I imported the stl file and fused after exploding then exported even that didn’t work for me.
I don’t understand where I am doing wrong

. I am out of all options and in great need of the community
Regards ,
Raj Kiran.

linnemann · March 8, 2019, 02:55

Can you please share your files via either dropbox, GDrive Onedrive?

Rakkiran · March 8, 2019, 03:19

I don't have the polymesh right now. But here are the files which I can upload

https://drive.google.com/open?id=1Jm...-FQbkGaaWKOKSo

linnemann · March 12, 2019, 09:23

Hi

I would use cfmesh or salome.

Salome you can mesh one face and then extrude to the height you need.

See the screenshots.

Rakkiran · March 12, 2019, 10:02

Thank you very much for working out the problem and I don't know how to use cfMesh. I would be very grateful if you could share the workflow in salome so that I could have a guidance for what you have done.

Regards,
Raj Kiran.

linnemann · March 13, 2019, 01:21

Here is a good guide to get started with cfmesh.
It is included with the openfoam.com version.

Regarding Salome

Here is a link to the case both with cfmesh and the .hdf file for Salome.

https://drive.google.com/open?id=1Bk...ZPYjvDwUytExix

Rakkiran · March 13, 2019, 01:30

Thank you so much for bearing with beginners like me

. I will try, and post if I get any problem . Will also post if I get my results.

Best Regards,
Raj Kiran.

February 1, 2019, 09:42	Meshing Airfoil sections using SHM	#1
Rakkiran New Member Raj Kiran Join Date: May 2018 Posts: 24 Rep Power: 8	Hello Foamers, I am simulating a VAWT with a NACA0018 profile. I modeled it in ICEM and meshing is done using SHM but always the mesh is very bad. I cleaned the exported stl file in blender for getting a waterproof stl but got some bad mesh results. Also tried few python scripts which i got online in blender for modeling NACA profile but even that didn’t give a good result. I tried Salome where I imported the stl file and fused after exploding then exported even that didn’t work for me. I don’t understand where I am doing wrong . I am out of all options and in great need of the community Regards , Raj Kiran. Last edited by Rakkiran; February 1, 2019 at 11:41. Reason: Spell checks and for clear explanation

March 8, 2019, 02:55		#2
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	Can you please share your files via either dropbox, GDrive Onedrive? __________________ Linnemann PS. I do not do personal support, so please post in the forums.

March 13, 2019, 01:21		#6
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	Here is a good guide to get started with cfmesh. It is included with the openfoam.com version. Regarding Salome Here is a link to the case both with cfmesh and the .hdf file for Salome. https://drive.google.com/open?id=1Bk...ZPYjvDwUytExix Rakkiran likes this. __________________ Linnemann PS. I do not do personal support, so please post in the forums.

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March 8, 2019, 03:19		#3
Rakkiran New Member Raj Kiran Join Date: May 2018 Posts: 24 Rep Power: 8	I don't have the polymesh right now. But here are the files which I can upload https://drive.google.com/open?id=1Jm...-FQbkGaaWKOKSo

March 12, 2019, 10:02		#5
Rakkiran New Member Raj Kiran Join Date: May 2018 Posts: 24 Rep Power: 8	Thank you very much for working out the problem and I don't know how to use cfMesh. I would be very grateful if you could share the workflow in salome so that I could have a guidance for what you have done. Regards, Raj Kiran.

March 13, 2019, 01:30		#7
Rakkiran New Member Raj Kiran Join Date: May 2018 Posts: 24 Rep Power: 8	Thank you so much for bearing with beginners like me . I will try, and post if I get any problem . Will also post if I get my results. Best Regards, Raj Kiran.