# No-slip boundary condition for oscillating airfoil

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 May 7, 2013, 19:29 No-slip boundary condition for oscillating airfoil #1 Senior Member   Tarak Join Date: Aug 2010 Location: State College, PA Posts: 110 Rep Power: 9 Hii, I'm using the pimpleDyMFoam solver for simulations of flow over a sinusoidally oscillating airfoil. I have an AMI surface which oscillates along with the airfoil. For this problem, can someone tell me how to use the no-slip BC for U at the airfoil surface? I'm thinking about 2 BC's right now: 1) movingwallvelocity 2) oscillatingFixedValue Please let me know which one is better suited for this purpose. Thanks, Tarak

 May 8, 2013, 02:47 #2 Senior Member   HECKMANN Frédéric Join Date: Jul 2010 Posts: 237 Rep Power: 10 I don't understand your question... A no slip boundary condition is done by setting a relative velocity (wall vs air) equal to zero at the wall. If I understand, your problem is that the wall is actually moving so the wall velocity is not anymore (0 0 0) ? From my understanding of the Dynamic Mesh in OpenFoam, there is a loop of correction to take into account the displacement of the mesh. So a fixedValue (0 0 0) should still be right ?! That's actually a good question

 May 12, 2013, 06:09 #3 Member   Join Date: Apr 2013 Posts: 32 Rep Power: 6 movingWallVelocity specifies velocity relative to the (moving) mesh. fixedValue is velocity relative to space. You should use movingWallVelocity for the no-slip on the foil.

June 5, 2013, 07:04
stick-slip boundary
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nauman
Join Date: Jun 2013
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Quote:
 Originally Posted by Tarak Hii, I'm using the pimpleDyMFoam solver for simulations of flow over a sinusoidally oscillating airfoil. I have an AMI surface which oscillates along with the airfoil. For this problem, can someone tell me how to use the no-slip BC for U at the airfoil surface? I'm thinking about 2 BC's right now: 1) movingwallvelocity 2) oscillatingFixedValue Please let me know which one is better suited for this purpose. Thanks, Tarak
hello
i am a new member, i am doing some research in fluid dynamic and want some help from any one related to my research how to approach stick-slip conditions
thanks
nauman

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