[fumiya]

Hi,

I'm studying the "continuous" adjoint method by reading Dr.Soto's article
titled "ON THE COMPUTATION OF FLOW SENSITIVITIES FROM BOUNDARY
INTEGRALS".
http://www.scs.gmu.edu/~rlohner/page.../reno04adj.pdf

I have a question regarding this article. Could someone answer the
following question?

Q)Question about the derivation of the adjoint boundary conditions
My understanding is that the adjoint boundary conditions are derived so
that all the boundary terms of equation (13) are exactly canceled at all
boundaries. I think we need the value of δu and δp at boundaries when
deriving the conditions.

Could you tell me how to know these values?

It says in this article that "δu=0 on S and on the outflow (Γout)(δu is the
test function associated to the adjoint velocity, then it is zero wherever
ψu is prescribed)" but I can't understand the meaning of this description at
all.

Thanks.