13 Nov
2015
13 Nov
'15
9:07 p.m.
On 13 Nov 2015, at 20:34, Justin Chang <jychang48@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