# Create finite element space
space = H1Space(mesh, shapeset)
set_bc(space)
space.set_uniform_order(P_INIT)
# Enumerate basis functions
space.assign_dofs()
# Initialize the discrete problem
wf = WeakForm(1)
set_forms(wf)
# Visualize solution, gradient, and mesh
sview = ScalarView("Coarse solution", 0, 0, 600, 1000)
gview = VectorView("Gradient", 610, 0, 600, 1000)
oview = OrderView("Polynomial orders", 1220, 0, 600, 1000)
# Matrix solver
solver = DummySolver()
# Adaptivity loop
it = 1
ndofs = 0
done = False
cpu = 0.0
sln_coarse = Solution()
sln_fine = Solution()
ndofs += xvel.assign_dofs(ndofs)
ndofs += yvel.assign_dofs(ndofs)
ndofs += press.assign_dofs(ndofs)
xprev = Solution()
yprev = Solution()
xprev.set_zero(mesh)
yprev.set_zero(mesh)
# initialize the discrete problem
wf = WeakForm(3)
set_forms(wf, xprev, yprev)
# visualize the solution
vview = VectorView("velocity [m/s]", 0, 0, 1200, 350)
pview = ScalarView("pressure [Pa]", 0, 500, 1200, 350)
vview.set_min_max_range(0, 1.9)
vview.show_scale(False)
pview.show_scale(False)
pview.show_mesh(False)
solver = DummySolver()
sys = LinSystem(wf, solver)
sys.set_spaces(xvel, yvel, press)
sys.set_pss(pss)
#dp.set_external_fns(xprev, yprev)
EPS_LOW = 0.0014
for i in range(1000):
