def testConstF_FreeBottom_smallK(self):
k = 1.e-8
mp = self.getScalarMask(include_bottom=False)
mv = self.getVectorMask(include_bottom=True)
u_ref, p_ref, f = self.setSolutionFixedBottom(p0=2500,
pb=4000.,
f0=10.,
fb=10.,
k=k)
p = p_ref # *mp
u = u_ref * mv
df = DarcyFlow(self.dom, verbose=VERBOSE, solver=self.SOLVER)
df.setValue(g=f,
location_of_fixed_pressure=mp,
location_of_fixed_flux=mv,
permeability=Scalar(k, Function(self.dom)))
v, p = df.solve(u, p)
self.assertTrue(
Lsup(v - u_ref) < self.TEST_TOL * Lsup(u_ref),
"flux error too big.")
self.assertTrue(
Lsup(p - p_ref) < self.TEST_TOL * Lsup(p_ref),
"pressure error too big.")
except ImportError:
HAVE_FINLEY = False
from esys.weipa import saveVTK
if not HAVE_FINLEY:
print("Finley module not available")
else:
# generate domain:
mydomain = Rectangle(l0=2.,l1=1.,n0=40, n1=20)
# normal flux is given
x = mydomain.getX()
# set location of fixed pressure and flux:
p_BC=whereZero(x[1]-1.)*wherePositive(x[0]-1.)
u_BC=(whereZero(x[0])+whereZero(x[0]-2.)) * [1.,0.] + \
(whereZero(x[1]) + whereZero(x[1]-1.)*whereNonPositive(x[0]-1.0)) * [0., 1.]
# define darcy flow solver:
mypde = DarcyFlow(domain=mydomain)
mypde.setValue(g=[0., 2],
location_of_fixed_pressure=p_BC,
location_of_fixed_flux=u_BC,
permeability=100.)
u,p=mypde.solve(u0=x[1]*[0., -1.], p0=0)
# write u to an external file
saveVTK("u.vtu",flux=u, pressure=p)