On Oct 31, 2008, at 2:00 PM, Benjamin Kirk wrote: > I use it to extract element-based Dofs, and they get properly > constrained. > Would the residual value then be the current value - the constraned > value, > as you mention?
I didn't know that method existed. It looks like it's pretty much achieving the same goal that enforce_constraints_exactly() does.... it at least means that you are calculating your next residual using the properly constrained value. Unfortunately, this doesn't help with calculating a constrained value. For instance, let's say that on solve #23 your solver decides it's converged... and libMesh writes out the solution. Do you have any idea what the value of your solution at the hanging nodes is? Unless you called enforce_constraints_exactly() before you wrote out the solution.... you don't. One idea would be for me to overwrite my own residual before I add it into the global residual.... I guess I could call is_constrained() on every node on the element and if it is then I could overwrite what residual is there with u - constrained_value before I add it in..... this is essentially the work I was thinking constrain_element_residual() would do. Derek ------------------------------------------------------------------------- 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-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-devel
