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No-slip boundary condition for oscillating airfoil

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Old   May 7, 2013, 19:29
Default No-slip boundary condition for oscillating airfoil
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Tarak
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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
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Old   May 8, 2013, 02:47
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HECKMANN Frédéric
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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
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Old   May 12, 2013, 06:09
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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.
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Old   June 5, 2013, 07:04
Smile stick-slip boundary
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nauman
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Quote:
Originally Posted by Tarak View Post
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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