"Smith, Barry F." <[email protected]> writes: > Hmm, I never had this idea presented to me, I have no way to know if > it is particularly good or bad. So essentially you transform the > matrix "decoupling the physics alone the diagonal" and then do > PCFIELDSPLIT instead of using PCFIELDSPLIT directly on the original > equations.
We talked about this several years ago, e.g., in the context of a low-Mach preconditioner (acting in the pressure space) when using conservative variables.
