def test_flux_2_triangles(self):
"""Flow between two triangles
Check that fluxes have opposite signs
"""
a = [0.0, 0.5]
b = [0.0, 0.0]
c = [0.5, 0.5]
d = [0.5, 0.0]
points = [a, b, c, d]
vertices = [ [0,1,2], [3,2,1] ]
domain = Advection_Domain(points, vertices)
domain.check_integrity()
#Populate boundary array with dirichlet conditions.
domain.neighbours = num.array([[1,-1,-2], [0,-3,-4]])
domain.set_quantity('stage', [1.0, 0.0], location='centroids')
domain.distribute_to_vertices_and_edges()
domain.compute_fluxes()
X = domain.quantities['stage'].explicit_update
assert X[0] == -X[1]
def test_flux_1_triangle0(self):
a = [0.0, 0.5]
b = [0.0, 0.0]
c = [0.5, 0.5]
points = [a, b, c]
vertices = [ [0,1,2] ]
domain = Advection_Domain(points, vertices)
domain.check_integrity()
#Populate boundary array with dirichlet conditions.
domain.neighbours = num.array([[-1,-2,-3]])
domain.quantities['stage'].boundary_values[:] = 1.0
domain.order = 1
domain.distribute_to_vertices_and_edges() #Use first order default
domain.check_integrity()
domain.compute_fluxes()
U = -domain.quantities['stage'].explicit_update
R = -0.5/domain.areas[0]
assert U==R, '%s %s' %(U, R)
def test_flux_1_triangle1(self):
a = [0.0, 0.5]
b = [0.0, 0.0]
c = [0.5, 0.5]
points = [a, b, c]
vertices = [[0, 1, 2]]
domain = Advection_Domain(points, vertices)
domain.check_integrity()
domain.set_quantity('stage', [1.0], location='centroids')
domain.distribute_to_vertices_and_edges()
domain.check_integrity()
domain.compute_fluxes()
U = -domain.quantities['stage'].explicit_update
R = 0.5 / domain.areas[0]
assert U == R, '%s %s' % (U, R)
def test_flux_1_triangle1(self):
a = [0.0, 0.5]
b = [0.0, 0.0]
c = [0.5, 0.5]
points = [a, b, c]
vertices = [ [0,1,2] ]
domain = Advection_Domain(points, vertices)
domain.check_integrity()
domain.set_quantity('stage', [1.0], location='centroids')
domain.distribute_to_vertices_and_edges()
domain.check_integrity()
domain.compute_fluxes()
U = -domain.quantities['stage'].explicit_update
R = 0.5/domain.areas[0]
assert U==R, '%s %s' %(U, R)