# oscillating airfoil in an inviscid fluid flow

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 December 8, 2007, 03:15 oscillating airfoil in an inviscid fluid flow #1 S.T Guest   Posts: n/a How can we apply pressure boundary condition on airfoil surface oscillating in an inviscid fluid flow?

 December 8, 2007, 06:30 Re: oscillating airfoil in an inviscid fluid flow #2 Alex Guest   Posts: n/a Why do you need a pressure boundary condition, not the standard vanishing normal velocity on the airfoil?

 December 8, 2007, 07:36 Re: oscillating airfoil in an inviscid fluid flow #3 S.T Guest   Posts: n/a I want to solve unsteady Euler equations using C-type mesh. that's why I need pressure boundary condition on the airfoil surface.

 December 8, 2007, 12:53 Re: oscillating airfoil in an inviscid fluid flow #4 Peter Attar Guest   Posts: n/a 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.

 December 10, 2007, 02:17 Re: oscillating airfoil in an inviscid fluid flow #5 S.T Guest   Posts: n/a 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 !

 December 10, 2007, 06:25 Re: oscillating airfoil in an inviscid fluid flow #6 CFD Student Guest   Posts: n/a http://aiac.ae.metu.edu.tr/db/serv.p...=AIAC-2007-017 this might help you...

 December 10, 2007, 09:07 Re: oscillating airfoil in an inviscid fluid flow #7 Peter Attar Guest   Posts: n/a 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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