OK, it's in. I like this example because the Lagrange multiplier has a simple physical interpretation: it's the traction required to satisfy the constraint.
David On 03/29/2012 08:27 PM, Kirk, Benjamin (JSC-EG311) wrote: > I haven't looked at it yet but my general comment is by all means more > examples are better... We can always rearrange later, but adding content is > hugely appreciated. > > > > > > On Mar 29, 2012, at 7:23 PM, "David Knezevic"<dkneze...@seas.harvard.edu> > wrote: > >> I was at a COMSOL junket today, and they said they have a cool feature >> that allows you to enforce constraints. Then they showed a constraint >> example of a uniformly loaded 2D cantilever, where you want to figure >> out what upward force is required on the free boundary of the cantilever >> to obtain zero vertical displacement there. >> >> This is just a small change wrt systems_of_equations_ex4, we just need >> to add a Lagrange multiplier (SCALAR). So I figured I'd implement it >> (see attached). Should I check it in? (Tell me if I'm going overboard >> with the examples... it's a bit addictive though hehe) >> >> David >> <systems_of_equations_ex5.C> >> ------------------------------------------------------------------------------ >> This SF email is sponsosred by: >> Try Windows Azure free for 90 days Click Here >> http://p.sf.net/sfu/sfd2d-msazure >> _______________________________________________ >> Libmesh-devel mailing list >> Libmesh-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/libmesh-devel ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Libmesh-devel mailing list Libmesh-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-devel
