Hi,
I am solving a Cahn Hilliard Navier stokes system and that means solving
multiple sequential non-linear equations. This means I need to pass different
petsc options to the solver of each, and set them using PETSC_set_option for
each of the solvers one by one. Is there a recommended way to do this?
In my current implementation -
I have the following
class CHNS::CahnHilliard : public TransientNonlinearImplicitSystem,
public NonlinearImplicitSystem::ComputeResidual,
public NonlinearImplicitSystem::ComputeJacobian,
public NonlinearImplicitSystem::ComputeBounds,
public System::Initialization
and a similar one for the navier stokes equation.
I have a feeling that I need to switch the Nonlinear_solver member to one of
the child nonlinear_solver (Either PetcNonlinearSolver (for the case without
the variational inequality) or PetscDMNonlinearSolver (For the case with the
nonlinear inequality). Is there a simple way to do this? I am new to C++ so it
is mot very apparent to me what the solution to this problem is.
Thanks!
Subramanya Sadasiva
"But memory eventually fades. Turbulences damp out, internal strains yield to
plastic flow, concentration inhomogeneities diffuse to uniformity. Systems tend
to subside to very simple states,independent of their specific history."
Herbert Callen . Thermodynamics and an Introduction to Thermostatics.
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