[Nek5000-users] Adjoint outflow boundary condition

[nek5000-users at lists.mcs.anl.gov]

Hi Nek's,


I'd like to use the adjoint linear solver. I have a problem concerning the
outflow condition. The proper boundary condition would be:

(p-(1/Re)grad(u))*n=(U*n)*u

where:  -n is the normal
            - u is the adjoint velocity vector
            - U is the base flow  velocity vector
            - p is the adjoint pressure
            -Re Reynolds number

How can I apply this condition on the outflow?

Best Regards,

Andrea
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