[snappyHexMesh] snappyHexMesh issue on parallel meshing

makaveli_lcf · February 20, 2018, 13:08

Dear FOAMers,

just encountered an issue when running snappyHex in parallel, please check and image attached.

The artifacts appear when I have added the layers and mesh distortion location is aligned with processor boundaries.Mesh_4cpus.png

makaveli_lcf · February 20, 2018, 17:27

Beg you pardon guys, the issue was about medial smoothing, by default it goes all way away from corners and made such a fancy patterns in my mesh. The solution is one line:

Code:

    // To avoid distortion
    nMedialAxisIter 10

A detailed description is quite good at
https://www.openfoam.com/documentati...sh-layers.html

My next step will be to use some other solver for smoothing displacements, but I will need newer version than OF4

February 20, 2018, 13:08	snappyHexMesh issue on parallel meshing	#1
makaveli_lcf Senior Member Dr. Alexander Vakhrushev Join Date: Mar 2009 Posts: 250 Blog Entries: 1 Rep Power: 19	Dear FOAMers, just encountered an issue when running snappyHex in parallel, please check and image attached. The artifacts appear when I have added the layers and mesh distortion location is aligned with processor boundaries.Mesh_4cpus.png __________________ Best regards, Dr. Alexander VAKHRUSHEV Christian Doppler Laboratory for "Metallurgical Applications of Magnetohydrodynamics" Simulation and Modelling of Metallurgical Processes Department of Metallurgy University of Leoben http://smmp.unileoben.ac.at

February 20, 2018, 17:27		#2
makaveli_lcf Senior Member Dr. Alexander Vakhrushev Join Date: Mar 2009 Posts: 250 Blog Entries: 1 Rep Power: 19	Beg you pardon guys, the issue was about medial smoothing, by default it goes all way away from corners and made such a fancy patterns in my mesh. The solution is one line: Code: // To avoid distortion nMedialAxisIter 10 A detailed description is quite good at https://www.openfoam.com/documentati...sh-layers.html My next step will be to use some other solver for smoothing displacements, but I will need newer version than OF4 __________________ Best regards, Dr. Alexander VAKHRUSHEV Christian Doppler Laboratory for "Metallurgical Applications of Magnetohydrodynamics" Simulation and Modelling of Metallurgical Processes Department of Metallurgy University of Leoben http://smmp.unileoben.ac.at

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