[Libmesh-users] [Libmesh-devel] element by element preconditioning?

[John P. <pet...@cf...>]

seid mehdi bostandoust nik writes:
 > Hi
 > Based on hughes,Tezduyar and others it is possible to
 > solve Navier-Stokes equations with iterative solvers
 > by the help of element by element preconditioning.
 > 
 > I am using petsc and currently in Petsc there is not
 > element by element preconditioning(it is said that
 > this feature may be added to PETSC3.0).
 > I want to know that does the libmesh solver support
 > element by element preconditioning for iterative
 > solvers or not?

We use a global element stiffness matrix instead of an
element-by-element approach.  All of the solvers are set
up to form a global (distributed) matrix and then perform
a global solve.  The element matrices are of the DenseMatrix
type defined by the library and currently do not implement
any sort of preconditioning.

-John