Hello Michael: I'm a new user, not a developer, but for this question it doesn't matter. What you need to do is spend some quality time with the examples, focused on Example 18. This process took me a while, but if you understand Example 18 than you are very close to solving nonlinear PDEs in parallel. Specifically to answer your question, as I understand it there are two general ways to solve PDEs in LibMesh. There is the standard approach which is well presented in examples 0-17 and there is a newer approach (and more simplified from an implementation point of view), the DiffSystem framework, that is addressed in example 18. My understanding based upon hours and hours of looking through the class documentation is that the DiffSystem framework is exactly that, a framework, that uses the standard LibMesh functionality in a unified/flexible way, benefiting newer and less familiar users.
Nasser Mohieddin Abukhdeir Graduate Student (Materials Modeling Research Group) McGill University - Department of Chemical Engineering http://webpages.mcgill.ca/students/nabukh/web/ http://mmrg.chemeng.mcgill.ca/ [EMAIL PROTECTED] wrote: > ------------------------------ > > Message: 8 > Date: Fri, 26 Sep 2008 17:12:30 -0400 > From: Michael Povolotskyi <[EMAIL PROTECTED]> > Subject: [Libmesh-users] nonlinear system assembly > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Dear Libmesh developers, > I'm working on a non-linear partial differential equation. > I'd like to solve it using the Newton method. > > My question: > Which libmesh object I have to create: NonlinearInplicitSystem or > DifferentiableSystem? > > Thank you, > Michael. > > > > ------------------------------ > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > ------------------------------ > > _______________________________________________ > Libmesh-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users > > > End of Libmesh-users Digest, Vol 29, Issue 1 > ******************************************** > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
