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blockMesh,snappyMesh and experimental results for 2D airfoil
Posted April 1, 2013 at 04:17 by skeptik
A certain Mahdi wrote me via e-mail, that my tetra-mesh and hybrid mesh was not good for simulations.
So here i show results which were obtained with C-mesh generated by blockMesh utility OF, and snappyHexMesh.
blockMesh domain
mesh near wall
snappyHexMesh domain
boundary layer discretization
finally, results of both mesh
The simulation's results lines are close to each other espesially when alpha<alpha critical. When alpha>alpha critical the discrepancy presents due to bad mesh at the tail in snappyHexMesh variant.
Anyway simulation results obtained from hexa mesh are similar to results were obtained from tetra mesh. So i think it doesn't make sence which mesh is used for SIMPLE calcs.
PISO results coming soon. It seems that it would be better than PISO on tetra meshes.
So here i show results which were obtained with C-mesh generated by blockMesh utility OF, and snappyHexMesh.
blockMesh domain
mesh near wall
snappyHexMesh domain
boundary layer discretization
finally, results of both mesh
The simulation's results lines are close to each other espesially when alpha<alpha critical. When alpha>alpha critical the discrepancy presents due to bad mesh at the tail in snappyHexMesh variant.
Anyway simulation results obtained from hexa mesh are similar to results were obtained from tetra mesh. So i think it doesn't make sence which mesh is used for SIMPLE calcs.
PISO results coming soon. It seems that it would be better than PISO on tetra meshes.
Total Comments 3
Comments
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Hi skeptik!
I'm currently doing some simulations of flow over airfoils, but i have some trouble getting a nice mesh with snappyHexMesh...
could you please send me your snappyhexMeshDict you used for this case, cause the mesh looks very nice!
Thank you in advance
ArminPosted April 17, 2013 at 13:05 by arming
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eventually it's not a good mesh. I just exceeded amount of files can be loaded to the post. The problem was described here. And i still don not know how to generate good mesh at the tail of the foil.Quote:Originally Posted by arming
Hi skeptik!
I'm currently doing some simulations of flow over airfoils, but i have some trouble getting a nice mesh with snappyHexMesh...
could you please send me your snappyhexMeshDict you used for this case, cause the mesh looks very nice!
Thank you in advance
ArminPosted April 18, 2013 at 01:23 by skeptik
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Archive with case files is here
https://www.dropbox.com/s/1ih182x44v...appyHex.tar.gz
There are both snappyHex case and 2Dextrusion case with extrusion dictionary. In the one of this case resulted mesh was saved and archived.
Enjoy.Posted April 18, 2013 at 03:13 by skeptik
