Ps: I am solving Navier-Stokes equation (pressure-correction equation in particular). The matrix is sparse and in mpiaij fotmat.
Il 13 Dic 2017 8:39 AM, "Jed Brown" <[email protected]> ha scritto: > When asking solvers advice, please always explain the problem you are > solving and the discretization that you use. > > Edoardo alinovi <[email protected]> writes: > > > Dear petsc users, > > > > I am doing some calculations to test my code in parallel using petsc. > With > > respect the serial code, which uses an in house bicstab+diagonal ILU > > preconditioner, I note that petsc's bicgstab+ASM with standard options > need > > a larger number of iterations to converge (order 3 to 5). In base on your > > expirience, do you have any method to improve the preconditioning? > > > > Thak you ery much, > > > > Edoardo >
