If you don't have a bifurcation you can just write a loop around your solver and ramp up your parameter each "step".
John: does the ContinuationSystem offer any advantages in this case? Derek On Mon, Jun 6, 2016 at 11:27 AM John Peterson <jwpeter...@gmail.com> wrote: > On Fri, Jun 3, 2016 at 1:34 PM, Harriet Li <kame...@gmail.com> wrote: > > > Hello all, > > > > I'm looking to solve a nonlinear problem where the nonlinearity is > > controlled by some parameter. The Newton solver does not converge at the > > desired parameter value without a better initial guess than I have. > > > > Is this a problem I can apply the ContinuationSystem class to? Can I > solve > > the problem at an initial parameter value and use the class's methods to > > work towards a solution at a designated final parameter value? (I don't > see > > a way to tell the continuation where to stop...) > > > > The ContinuationSystem can be used for this. > > Note that it does arclength continuation (see the Keller reference in > continuation_system.h) so it might be overkill for what you are doing if > there are no turning points/bifurcations in the nonlinear system (i.e. you > just want to slowly ramp up the nonlinear parameter and re-solve the system > multiple times). As far as when it should "stop", this is controlled by > the > > Real min_continuation_parameter; > Real max_continuation_parameter; > > parameters in the class. > > -- > John > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and > traffic > patterns at an interface-level. Reveals which users, apps, and protocols > are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
