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Poor quality of mesh after deformation (SU2-5.0.0) |
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March 11, 2017, 02:21 |
Poor quality of mesh after deformation (SU2-5.0.0)
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#1 |
New Member
WANG,Hao
Join Date: Sep 2016
Location: Xi'an China
Posts: 19
Rep Power: 10 |
I used SU2_DEF to evaluate CRM wing grid deformation, but the quality of my structured mesh is pretty bad. My question is whether the FFD box settings could affect the grid deformation,for example the distance of FFD box from the wall. Another question is whether the strctured mesh doesn't fit SU2_DEF?
Could anyone help with this ? thank you! Here are my FFD boxes, configuration file and slice of my wing (red color is deformed grid, the black one is original grid) |
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March 11, 2017, 04:54 |
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#2 | |
Senior Member
Heather Kline
Join Date: Jun 2013
Posts: 309
Rep Power: 14 |
Quote:
There are some deformation settings that can be altered to get a smoother deformation, see the GRID DEFORMATION PARAMETERS section of the config_template.cfg file provided with the code. You may also want to check whether the FFD box boundary intersects the geometry at any point (which would freeze a plane of the box). |
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March 11, 2017, 08:30 |
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#3 | |
New Member
WANG,Hao
Join Date: Sep 2016
Location: Xi'an China
Posts: 19
Rep Power: 10 |
Quote:
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March 14, 2017, 16:47 |
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#4 | |
Senior Member
Heather Kline
Join Date: Jun 2013
Posts: 309
Rep Power: 14 |
Quote:
The grid deformation method uses the spring analogy, which does mean that shapes that would be unstable in a physical structure (ie, a square vs a triangle) suffer from the same problems in the mesh deformation. One thing to try is using the stiffness parameters, ie using wall distance which will better preserve the shape of the mesh near the wall, or increasing the constant stiffness (with DEFORM_ELASTICITY_MODULUS, which defaults to 2E11) |
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March 17, 2017, 05:10 |
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#5 | |
New Member
WANG,Hao
Join Date: Sep 2016
Location: Xi'an China
Posts: 19
Rep Power: 10 |
Quote:
Thank you again |
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July 5, 2019, 10:48 |
prisms vs tets
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#6 | |
New Member
Vishnu KV
Join Date: Mar 2019
Posts: 5
Rep Power: 7 |
Quote:
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Tags |
ffd, grid deformation |
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