Re: [Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-23 Thread Derek Gaston
lol - whoops - disregard that email... wrong one ;-) On Tue, Apr 23, 2013 at 2:05 PM, John Peterson wrote: > On Tue, Apr 23, 2013 at 2:04 PM, Derek Gaston wrote: > > Ling - come talk to David and or John about it if it's still not clear. > > ??? > > -- > John >

Re: [Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-23 Thread John Peterson
On Tue, Apr 23, 2013 at 2:04 PM, Derek Gaston wrote: > Ling - come talk to David and or John about it if it's still not clear. ??? -- John -- Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS

Re: [Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-23 Thread Derek Gaston
Ling - come talk to David and or John about it if it's still not clear. Derek On Tue, Apr 23, 2013 at 9:29 AM, Kirk, Benjamin (JSC-EG311) < benjamin.kir...@nasa.gov> wrote: > And by that I mean you get a mass matrix on the left hand side and the > pressure gradient only shows up inside the sou

Re: [Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-23 Thread Kirk, Benjamin (JSC-EG311)
And by that I mean you get a mass matrix on the left hand side and the pressure gradient only shows up inside the source term, where it is integrated inside he element and is well posed. -Ben On Apr 23, 2013, at 8:26 AM, "Kirk, Benjamin (JSC-EG311)" wrote: > Are you using a finite element

Re: [Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-23 Thread Kirk, Benjamin (JSC-EG311)
Are you using a finite element method? If so, you wind up weighting this term under an integral and everything works out. -Ben On Apr 22, 2013, at 7:42 PM, "Zhang" wrote: > > > > Dear all, > > As a beginner of libMesh, I am using it to build an incompressible N-S solver > with projectio

[Libmesh-users] How to project a solution from Q1 to Q2 space using libmesh

2013-04-22 Thread Zhang
Dear all, As a beginner of libMesh, I am using it to build an incompressible N-S solver with projection method. When I am trying to calculate as follows, u^{n+1}=u^{n}-dt*grad(p), I wonder how to project the pressure gradient grad(p) in Q1 space into the velocity u 's space Q2. Is there a