An abandoned attempt at this lies dormant in src/snes/impls/multiblock. We could try to revive it.
- Peter On Thu, Dec 13, 2012 at 11:25 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > Yes, but even more than linear fieldsplit, there are _many_ variations, > involving nonlinear change of basis and various types of elimination. I > worry that it may be even more complicated and harder to use. > > > On Thu, Dec 13, 2012 at 9:15 AM, Barry Smith <bsmith at mcs.anl.gov> wrote: > >> >> 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/20121213/6d2bde7e/attachment-0001.html>
