Re: [Libmesh-devel] DirichletBoundary for constraining variables in terms of each other?

2014-04-06 Thread Roy Stogner
On Sun, 6 Apr 2014, David Knezevic wrote: > Is it possible to impose a linear constraint on the variables in a > system using a DirichletBoundary object? Currently, no. > The case I'm thinking of is in elasticity, where you want set the > displacement in the normal (or tangential) direction on

[Libmesh-devel] DirichletBoundary for constraining variables in terms of each other?

2014-04-06 Thread David Knezevic
Is it possible to impose a linear constraint on the variables in a system using a DirichletBoundary object? The case I'm thinking of is in elasticity, where you want set the displacement in the normal (or tangential) direction on a surface. In that case we want "n \dot (u,v,w) = normal_displace