Gaetan Kenway <gaetank at gmail.com> writes: > For the forward solve I use ASM+ILU in the same manner as for the adjoint > problem. > The ASM not a bottleneck per se. Typically we see the adjoint problem > taking the same amount of time as the non-linear problem for well-behaved > flows, and the adjoint is shorter for less well-behaved flows.
Sounds reasonable. > The real problem I am having is for certain RANS cases, the > frozen turbulence adjoint is extremely difficult to solve --- requiring > GMRES subspace sizes on the order of 400-500 to converge. Hmm, which turbulence model are you using? Is it related to stretched grids? Continuous or discrete adjoint?
