On Tue, Apr 7, 2015 at 2:55 PM, Manav Bhatia <[email protected]> wrote:
> Hi, > > I am curious if anyone has any experience/thoughts about addition of > Lagrange multipliers to handle multi body dynamic constraints. > > This would likely need addition of Lagrange variables associated with > individual constraint equations, as opposed to the example problem (in > source code) which uses Lagrange multiplier with the incompressible N-S > equations, requiring a distributed scalar variable. > > Any thoughts on how this could be included in the libMesh framework? > IIRC at the moment we assume that all dofs in the system can be involved in the constraint equation (i.e. SCALAR variables are coupled with all other dofs). That is the most general case, and as a result you should be able to impose whatever constraint equation you want using a SCALAR Lagrange mulitplier, no? We could be more efficient (i.e. allocate fewer dofs in the sparsity pattern) if we knew that the constraint was local to a few dofs. But that's just an optimization... Am I misinterpreting you here? David ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
