2011/10/31 Gong Ding <gdiso at ustc.edu> > Hi, > I have several materials, each has different dofs. > It is a block matrix with nonuniform block size. > However, I know it is impossible to set different block size within a BAIJ > matrix -- sigh. > I can only use AIJ matrix here. > My question is let a ILU preconditioner of AIJ matrix do block > factorization? > > I guess the block ILU can be > 1) more efficient since it is cache friendly. > 2) more accurate since it has a "matched" structure. > > Or any suggestion?
I do not believe any sparse factorization package handles varying block size. Matt > > Gong Ding -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111031/063865e0/attachment.htm>
