Hi all
I am trying to adapt step-31 to solve a Boussinesq problem with a
time-dependent Stokes equation instead of the original time independent
one.
Therefore the velocity and temperature will be both functions of time and
the respective equations discretized in time by the BDF(2) method.
I am having some difficulties with the preconditioning of the Stokes part
and would appreciate some help:
1. Is the PreconditionStokes (TrilinosWrappers) class equivalent to
the preconditioner implemented in step-31 so I can use it instead of
modifying the original one in step-31?
2. In that case, what is meant by the pressure Laplace matrix L_p,
pressure convection-diffusion operator F_p and the pressure mass matrix M_p?
I presume that these matrices (at least some of) are already coded in
step-31 possibly under some other names but couldn't figure out the
correspondence.
--
TIA and best regards
Heitor Pina
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