[snappyHexMesh] Problems with snappyHexMesh

Sbaleman · December 14, 2016, 09:04

Hi all!

I am trying to perform a MRF simulation of a hyperboloid impeller rotating at 26 rpm in a closed compartment . However, I am facing problems with meshing the corners of the blades of the hyperboloid impeller (see attached figure).

The geometry of the impeller is created in Siemens NX, and exported as a .stl file. SnappyHexMesh was used to build the mesh. I uploaded the blockmesh and snappyHexMesh file here: https://www.dropbox.com/sh/ro2u2rh0c...iVAbXskea?dl=0

Any idea what to change in the settings of the snappyHexMesh file?

Best Regards,
Sophie

Sbaleman · January 9, 2017, 04:46

Dear all,

I am still have problems with meshing the impeller. I tried to change different settings in the surfaceFeatureExtract and snappyHexMesh files without any success.

Does anyone know how I solve this problem?

Thanks,
Sophie

chegdan · January 9, 2017, 15:12

An easy way to improve this, is to

reduce your base mesh spacing i.e. make you base mesh finer
increase the min and max level on the surface of the impeller

Most issues with snappyHexMesh are solved by increasing the resolution.

spitchers · January 9, 2017, 16:15

Increase the min max level of surface refinement on them surfaces. What are your current settings?

Sent from my iPhone using CFD Online Forum mobile app

December 14, 2016, 09:04	Problems with snappyHexMesh	#1
Sbaleman New Member Sophie Balemans Join Date: May 2016 Location: Ghent Universtiy Posts: 2 Rep Power: 0	Hi all! I am trying to perform a MRF simulation of a hyperboloid impeller rotating at 26 rpm in a closed compartment . However, I am facing problems with meshing the corners of the blades of the hyperboloid impeller (see attached figure). The geometry of the impeller is created in Siemens NX, and exported as a .stl file. SnappyHexMesh was used to build the mesh. I uploaded the blockmesh and snappyHexMesh file here: https://www.dropbox.com/sh/ro2u2rh0c...iVAbXskea?dl=0 Any idea what to change in the settings of the snappyHexMesh file? Best Regards, Sophie Last edited by Sbaleman; December 14, 2016 at 11:07. Reason: forgot the link

January 9, 2017, 04:46	Problems with snappyHexMesh	#2
Sbaleman New Member Sophie Balemans Join Date: May 2016 Location: Ghent Universtiy Posts: 2 Rep Power: 0	Dear all, I am still have problems with meshing the impeller. I tried to change different settings in the surfaceFeatureExtract and snappyHexMesh files without any success. Does anyone know how I solve this problem? Thanks, Sophie

January 9, 2017, 15:12		#3
chegdan Senior Member Daniel P. Combest Join Date: Mar 2009 Location: St. Louis, USA Posts: 621 Rep Power: 0	An easy way to improve this, is to reduce your base mesh spacing i.e. make you base mesh finer increase the min and max level on the surface of the impeller Most issues with snappyHexMesh are solved by increasing the resolution. KaLium likes this.

January 9, 2017, 16:15		#4
spitchers New Member Suffolk Join Date: Nov 2015 Posts: 26 Rep Power: 10	Increase the min max level of surface refinement on them surfaces. What are your current settings? Sent from my iPhone using CFD Online Forum mobile app Christian86 and KaLium like this.

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