On Mon, Mar 6, 2017 at 3:27 PM, Patrick Sanan <patrick.sa...@gmail.com> wrote:
> On Mon, Mar 6, 2017 at 1:48 PM, Kong, Fande <fande.k...@inl.gov> wrote: > > Hi All, > > > > I am solving a nonlinear system whose Jacobian matrix has a block > structure. > > More precisely, there is a mesh, and for each vertex there are 11 > variables > > associated with it. I am using BAIJ. > > > > I thought block ILU(k) should be more efficient than the point-wise > ILU(k). > > After some numerical experiments, I found that the block ILU(K) is much > > slower than the point-wise version. > Do you mean that it takes more iterations to converge, or that the > time per iteration is greater, or both? > The number of iterations is very similar, but the timer per iteration is greater. > > > > Any thoughts? > > > > Fande, >
