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S.T December 8, 2007 03:15

oscillating airfoil in an inviscid fluid flow
 
How can we apply pressure boundary condition on airfoil surface oscillating in an inviscid fluid flow?

Alex December 8, 2007 06:30

Re: oscillating airfoil in an inviscid fluid flow
 
Why do you need a pressure boundary condition, not the standard vanishing normal velocity on the airfoil?

S.T December 8, 2007 07:36

Re: oscillating airfoil in an inviscid fluid flow
 
I want to solve unsteady Euler equations using C-type mesh. that's why I need pressure boundary condition on the airfoil surface.

Peter Attar December 8, 2007 12:53

Re: oscillating airfoil in an inviscid fluid flow
 
the pressure BC can be obtained from the expression(latex math): {\partial p \over \partial n}=-\rho \vec{a}_b \cdot \vec{n} where \vec{a}_b is the acceleration of the body and \vec{n} is a vector normal to the surface.


S.T December 10, 2007 02:17

Re: oscillating airfoil in an inviscid fluid flow
 
the equation you mentioned must be applied in the fluid and we know that fluid particles slip on the airfoil surface and for slip condition we know that acceleration of body is not equal to fluid particles !

CFD Student December 10, 2007 06:25

Re: oscillating airfoil in an inviscid fluid flow
 
http://aiac.ae.metu.edu.tr/db/serv.p...=AIAC-2007-017

this might help you...

Peter Attar December 10, 2007 09:07

Re: oscillating airfoil in an inviscid fluid flow
 
You apply this to get the pressure and then a condition on the normal velocity(ie that they are the same for the fluid and structure). Look at any papers which deal with fluid-structure interaction and the Euler equations.


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