Re: [Libmesh-devel] Implicit Neighbor Dofs

2010-08-11 Thread Lorenzo Alessio Botti
>> Ok - we will probably check into this soon. The one issue is the >> above case where you have the discontinuous pressure variable. >> Is it ok to generate a sparsity pattern for that variable that is a >> bit large? Or is that too much of a waste for a fairly common case? > If the pres

Re: [Libmesh-devel] Implicit Neighbor Dofs

2010-08-10 Thread Roy Stogner
On Tue, 10 Aug 2010, Derek Gaston wrote: > Ok - we will probably check into this soon. The one issue is the > above case where you have the discontinuous pressure variable. > Is it ok to generate a sparsity pattern for that variable that is a > bit large? Or is that too much of a waste for

Re: [Libmesh-devel] Implicit Neighbor Dofs

2010-08-10 Thread Derek Gaston
On Aug 10, 2010, at 1:35 PM, Roy Stogner wrote: > Discontinuous pressure variables are a common situation, and IMHO > they're reason enough alone not to turn on implicit_neighbor_dofs for > every case where you see a single discontinuous variable. Aha! Good point! I knew I was forgetting a case

Re: [Libmesh-devel] Implicit Neighbor Dofs

2010-08-10 Thread Roy Stogner
On Tue, 10 Aug 2010, Derek Gaston wrote: > I can't think of a time when you would have discontinuous > variables that you are solving for and you wouldn't want implicit > neighbor dofs on. Discontinuous pressure variables are a common situation, and IMHO they're reason enough alone not to turn o

[Libmesh-devel] Implicit Neighbor Dofs

2010-08-10 Thread Derek Gaston
I'm looking into the implicit neighbor dof stuff in the sparsity pattern generator and I have a few observations. 1. Do you think it would be possible to change the default for implicit_neighbor_dofs such that if you have _any_ discontinuous variables you switch it to true? Right now you