# pressure boundary condition

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 October 29, 2007, 08:54 pressure boundary condition #1 kharati Guest   Posts: n/a What would be pressure boundary condition on airfoil surface that oscillates in inviscid and viscous fluid flow? please send me a paper regarding this subject.

 October 29, 2007, 11:42 Re: pressure boundary condition #2 Harish Guest   Posts: n/a That would depend on what kind of solver you are using and what velocity components that you use.A neumann boundary condition of dp/dn=0 or extrapolation seems to work.But it again depends on the details of your solver.

 October 29, 2007, 19:53 Re: pressure boundary condition #3 zonexo Guest   Posts: n/a Hi, I've been using dp/dn=0 in oscillating airfoil. However, some other ppl had used dp/dn=-(Du/Dt).n, where Du/dt is the material derivative and n is the normal. Is this a more accurate BC? Thanks

 October 29, 2007, 19:59 Re: pressure boundary condition #4 ag Guest   Posts: n/a Yes, the pressure gradient should be balanced by the normal acceleration. That's what the normal momentum equation can be approximated by at the boundary.

 November 3, 2007, 10:42 Re: pressure boundary condition #5 kharati Guest   Posts: n/a How can we calculate Du/Dt on an oscillating airfoil surface?

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