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May 19, 2018, 13:38 |
Oscillationg airfoil mesh
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#1 |
New Member
Hamid
Join Date: Mar 2018
Posts: 3
Rep Power: 8 |
hello friends
im new to openFoam and im going to simulate pitching and plunging 2d airfoil. i used the wing motion tut to start and changed the dynamicDict to inverseDistance and defined celldisplacement for the airfoil as solidbody. for low pitch angles every thing is ok but at high angles it has problem with mesh at the leading and trailing edge of airfoil. is it possible to select a region so that only that points movesT like sixdof? or what should i do so add or remove points or any other idea im using of4x thanks everybody |
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June 7, 2018, 17:52 |
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#2 | |
New Member
Hamid
Join Date: Mar 2018
Posts: 3
Rep Power: 8 |
Quote:
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June 8, 2018, 10:19 |
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#3 |
Senior Member
Join Date: Sep 2013
Posts: 353
Rep Power: 20 |
You could try the overset solvers / immersed boundaries in of1712 or foam-extend. Your mesh can naturally only be deformed to a certain degree. You might be able to increase your odds by switchting the mesh motion solver, but again only to a certain degree.
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July 1, 2018, 16:43 |
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#4 | |
New Member
Hamid
Join Date: Mar 2018
Posts: 3
Rep Power: 8 |
Quote:
I used overset solver (overPimpleDyMFoam) in of 1712. the U results seems to be good but p is unstable and i think that is not true. for example p suddenly increases to a high value and then back what can i do to solve it? thanks |
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July 16, 2018, 04:06 |
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#5 | |
New Member
Iman Sabahi
Join Date: May 2018
Posts: 17
Rep Power: 7 |
Quote:
I've seen cases that used rotating and sliding mesh, and they've defined a domain in their mesh which moves and rotates with the airfoil profile, so that the malformed mesh cells occur far from the airfoil surface, and onto more coarse cells.(Similar to RBF, Radial Basis Function, refer to "Jasak, H., & Tukovi'c. (2010). Dynamic Mesh Handling in OpenFOAM Applied to Fluid-Structure Interaction Simulations.") It would look something like the attached picture. |
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