[firedrake] RT/BDM works but not TH/VMS

[Lawrence Mitchell]

> On 13 Nov 2015, at 20:34, Justin Chang <jychang48 at gmail.com> wrote:
> 
> V = VectorFunctionSpace(mesh,"CG",1)
> Q = FunctionSpace(mesh,"CG",1)
> W = V*Q
> v,p = TrialFunctions(W)
> w,q = TestFunctions(W)
> ...
> a = (dot(v, w) - p*div(w) - div(v)*q)*dx + 0.5*dot(v+grad(p),w+grad(q))*dx
> L = f*q*dx
> 
> if that's what you're asking

Plausibly also your boundary conditions are not applied correctly. 

In the hdiv-L2 formulation I would apply the pressure bcs weakly. But they're homogeneous, so those surface integral a vanish. Because the spaces match correctly this is enough. In the TH or VMS formulation to you have to explicitly apply the bcs strongly to the pressure variable?

Lawrence
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