Cool! :-) -- Anders
--- Begin Message --------------------------------------------------------------- revno: 1437 committer: Marie E. Rognes <m...@simula.no> branch nick: ffc timestamp: Sun 2010-03-07 18:54:04 +0100 message: Added demo/Mini.ufl illustrating the use of bubble elements and ElementUnion. added: demo/Mini.ufl-- lp:ffc https://code.launchpad.net/~ffc-core/ffc/main Your team FFC Core Team is subscribed to branch lp:ffc. To unsubscribe from this branch go to https://code.launchpad.net/~ffc-core/ffc/main/+edit-subscription.=== added file 'demo/Mini.ufl' --- demo/Mini.ufl 1970-01-01 00:00:00 +0000 +++ demo/Mini.ufl 2010-03-07 17:54:04 +0000 @@ -0,0 +1,25 @@ +# Copyright (C) 2010 Marie E. Rognes +# Licensed under the GNU GPL version 3 or any later version +# +# Illustration of ElementUnion: The bilinear form a(v, u) for the +# Stokes equations using a mixed formulation involving the Mini +# element. The velocity element is composed of a P1 element augmented +# by the cubic bubble function. + +# Compile this form with FFC: ffc Mini.ufl + + +P1 = VectorElement("Lagrange", triangle, 1) +B = VectorElement("Bubble", triangle, None) +V = ElementUnion(P1, B) + +Q = FiniteElement("DG", triangle, 0) +Mini = V + Q + +(v, q) = TestFunctions(Mini) +(u, p) = TrialFunctions(Mini) + +f = Coefficient(P1) + +a = (inner(grad(v), grad(u)) - div(v)*p + q*div(u))*dx +L = inner(v, f)*dx
--- End Message ---
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