We could possibly provide the equivalent of PCFieldSplit for nonlinear problems? These could be accelerated via the various non-linear accelerates or even via matrix-free Newton?
Barry Begin forwarded message: > From: Jed Brown <jedbrown at mcs.anl.gov> > Subject: Re: Is there any example that allows time-integration provided by > users > Date: December 13, 2012 11:06:29 AM CST > To: Lulu Liu <lulu.liu at kaust.edu.sa>, Barry Smith <bsmith at mcs.anl.gov> > > It sounds like you want to do classical operator splitting (which is > notoriously inaccurate). The literature on these methods is rife with > special-purpose band-aids that I'd rather not try to support all of in PETSc. > > My preference would be to write your method as an ARKIMEX, with "trivial" > implicit part on the "part" of the equation that you wanted to treat > explicitly, or if you wanted to solve both implicitly (but decoupled) then do > the appropriate incomplete solve. Can you be more specific about what problem > you want to solve? > > > On Wed, Dec 12, 2012 at 7:42 AM, Lulu Liu <lulu.liu at kaust.edu.sa> wrote: > There is two equations in my system, and I want solve the first one, and then > solve the second equation. Is there any example that allows me to solve > equations one by one? > > > I want to solve nonlinear system on every time level, but it is feasible if I > could provide the time discretization schemes by myself. Is there any example > about this? > > Thank you! > > -- > Best wishes, > Lulu Liu > Applied Mathematics and Computational Science > King Abdullah University of Science and Technology > Tel??966?0544701599 > > > This message and its contents, including attachments are intended solely for > the original recipient. If you are not the intended recipient or have > received this message in error, please notify me immediately and delete this > message from your computer system. Any unauthorized use or distribution is > prohibited. Please consider the environment before printing this email. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20121213/65986587/attachment.html>
