AIJ
> On Dec 17, 2014, at 3:59 PM, Chung-Kan Huang <[email protected]> wrote:
>
> Hi,
>
> I am trying to find a best way to implement adaptive implicit method (AIM)
> using PETSc for the linear solver.
>
> I am solving conservation equations so if I have a N cells problem then I
> will end of solving a N*M by N*M linear system matrix for each cell has M
> equations (or variables) when I solve them fully implicitly. For such system
> I can use blocked matrix (BAIJ)
> In case each cell has its implicitness level varing from 1 to M so each sub
> block will have different size range from 1 by to M by M so BAIJ will be very
> inefficient in both storage and computations I supposed.
>
> So I am actually thinking if I should reconstruct matrix and using point
> matrix (AIJ) when implicitness changes but will this also too inefficient for
> constructing a new matrix?
>
> So what is the best way for me to implement AIM?
>
> Kan
>
