def solver_nonlinear(G, d_, w_, wd_, bcs, T, dt, action=None, **namespace):
dis_x = []; dis_y = []; time = []
solver_parameters = {"newton_solver": \
{"relative_tolerance": 1E-8,
"absolute_tolerance": 1E-8,
"maximum_iterations": 100,
#"krylov_solver": {"monitor_convergence": True},
#"linear_solver": {"monitor_convergence": True},
"relaxation_parameter": 0.9}}
t = 0
while t < (T - dt*DOLFIN_EPS):
solve(G == 0, wd_["n"], bcs, solver_parameters=solver_parameters)
# Update solution
times = ["n-3", "n-2", "n-1", "n"]
for i, t_tmp in enumerate(times[:-1]):
wd_[t_tmp].vector().zero()
wd_[t_tmp].vector().axpy(1, wd_[times[i+1]].vector())
w_[t_tmp], d_[t_tmp] = wd_[t_tmp].split(True)
# Get displacement
if callable(action):
action(wd_, t)
t += dt
if MPI.rank(mpi_comm_world()) == 0:
print "Time: ",t #,"dis_x: ", d(coord)[0], "dis_y: ", d(coord)[1]
return dis_x, dis_y, time
def Newton_manual(F, udp, bcs, atol, rtol, max_it, lmbda, udp_res, VVQ):
#Reset counters
Iter = 0
residual = 1
rel_res = residual
dw = TrialFunction(VVQ)
Jac = derivative(F, udp, dw) # Jacobi
while rel_res > rtol and residual > atol and Iter < max_it:
A = assemble(Jac)
A.ident_zeros()
b = assemble(-F)
[bc.apply(A, b, udp.vector()) for bc in bcs]
#solve(A, udp_res.vector(), b, "superlu_dist")
solve(A, udp_res.vector(), b) #, "mumps")
udp.vector()[:] = udp.vector()[:] + lmbda * udp_res.vector()[:]
#udp.vector().axpy(1., udp_res.vector())
[bc.apply(udp.vector()) for bc in bcs]
rel_res = norm(udp_res, 'l2')
residual = b.norm('l2')
if MPI.rank(mpi_comm_world()) == 0:
print "Newton iteration %d: r (atol) = %.3e (tol = %.3e), r (rel) = %.3e (tol = %.3e) " \
% (Iter, residual, atol, rel_res, rtol)
Iter += 1
return udp
def solver_nonlinear(G, d_, w_, wd_, bcs, T, dt, action=None, **namespace):
dis_x = []; dis_y = []; time = []
solver_parameters = {"newton_solver": \
{"relative_tolerance": 1E-8,
"absolute_tolerance": 1E-8,
"maximum_iterations": 100,
"relaxation_parameter": 1.0}}
t = 0
while t <= T:
solve(G == 0, wd_["n"], bcs, solver_parameters=solver_parameters)
# Update solution
times = ["n-3", "n-2", "n-1", "n"]
for i, t_tmp in enumerate(times[:-1]):
wd_[t_tmp].vector().zero()
wd_[t_tmp].vector().axpy(1, wd_[times[i+1]].vector())
w_[t_tmp], d_[t_tmp] = wd_[t_tmp].split(True)
# Get displacement
if callable(action):
action(wd_, t)
t += dt
if MPI.rank(mpi_comm_world()) == 0:
print "Time: ", t
def Newton_manual(F, vd, bcs, J, atol, rtol, max_it, lmbda\
, vd_res):
#Reset counters
Iter = 0
residual = 1
rel_res = residual
while rel_res > rtol and residual > atol and Iter < max_it:
A = assemble(J, keep_diagonal = True)
A.ident_zeros()
b = assemble(-F)
[bc.apply(A, b, vd.vector()) for bc in bcs]
#solve(A, vd_res.vector(), b, "superlu_dist")
#solve(A, vd_res.vector(), b, "mumps")
solve(A, vd_res.vector(), b)
vd.vector().axpy(1., vd_res.vector())
[bc.apply(vd.vector()) for bc in bcs]
rel_res = norm(vd_res, 'l2')
residual = b.norm('l2')
if MPI.rank(mpi_comm_world()) == 0:
print "Newton iteration %d: r (atol) = %.3e (tol = %.3e), r (rel) = %.3e (tol = %.3e) " \
% (Iter, residual, atol, rel_res, rtol)
Iter += 1
#Reset
residual = 1
rel_res = residual
Iter = 0
return vd
def print_text(text, color='white', atrb=0, cls=None):
"""
Print text <text> from calling class <cl> to the screen.
"""
if cls is not None:
color = cls.color()
if MPI.rank(mpi_comm_world())==0:
if atrb != 0:
text = ('%s%s' + text + '%s') % (fg(color), attr(atrb), attr(0))
else:
text = ('%s' + text + '%s') % (fg(color), attr(0))
print text
def get_text(text, color='white', atrb=0, cls=None):
"""
Returns text <text> from calling class <cl> for later printing.
"""
if cls is not None:
color = cls.color()
if MPI.rank(mpi_comm_world())==0:
if atrb != 0:
text = ('%s%s' + text + '%s') % (fg(color), attr(atrb), attr(0))
else:
text = ('%s' + text + '%s') % (fg(color), attr(0))
return text
def viz(results, runs):
if MPI.rank(mpi_comm_world()) != 0: pass
# TODO: Get minimum time of all to plot over consistent
plt.figure()
for i, r in enumerate(results):
displacement_x = np.array(r[0])
displacement_y = np.array(r[1])
time = np.array(r[2])
simulation_parameters = runs[i]
E = simulation_parameters["E"]
dt = simulation_parameters["dt"]
name = simulation_parameters["name"]
case_path = simulation_parameters["case_path"]
plt.plot(time, displacement_y, label=name)
plt.ylabel("Displacement y")
plt.xlabel("Time")
plt.legend(loc=3)
plt.hold("on")
plt.title("implementation: %s, dt = %g, y_displacement" % (name, dt))
# TODO: Move this to solver and use fenicsprobe
if MPI.rank(mpi_comm_world()) == 0:
if not path.exists(case_path):
makedirs(case_path)
print case_path
displacement_x.dump(path.join(case_path, "dis_x.np"))
displacement_t.dump(path.join(case_path, "dis_y.np"))
time.dump(path.join(case_path, "time.np"))
# Store simulation parameters
f = open(path.join(case_path, "param.dat", 'w'))
cPickle.dump(simulation_parameters, f)
f.close()
# FIXME: store in a consistent manner
plt.savefig("test.png")
def solver_linear(G, d_, w_, wd_, bcs, T, dt, action=None, **namespace):
a = lhs(G); L = rhs(G)
A = assemble(a)
b = assemble(L)
t = 0
#d_prec = PETScPreconditioner("default")
#d_solver = PETScKrylovSolver("gmres", d_prec)
#d_solver.parameters["monitor_convergence"] = True
#from IPython import embed; embed()
#d_solver.prec = d_prec
# Solver loop
while t < (T - dt*DOLFIN_EPS):
t += dt
# Assemble
assemble(a, tensor=A)
assemble(L, tensor=b)
# Apply BC
for bc in bcs: bc.apply(A, b)
# Solve
#d_solver.solve(A, wd_["n"].vector(), b)
solve(A, wd_["n"].vector(), b)
# Update solution
times = ["n-3", "n-2", "n-1", "n"]
for i, t_tmp in enumerate(times[:-1]):
wd_[t_tmp].vector().zero()
wd_[t_tmp].vector().axpy(1, wd_[times[i+1]].vector())
# Get displacement
if callable(action):
action(wd_, t)
if MPI.rank(mpi_comm_world()) == 0:
print "Time: ",t
t0 = timer.time()
#try:
if r["space"] == "mixedspace":
problem_mix(**vars())
elif r["space"] == "singlespace":
problem_single()
else:
print("Problem type %s is not implemented, only mixedspace " +
"and singlespace are valid options") % r["space"]
sys.exit(0)
#except Exception as e:
# print "Problems for solver", r["name"]
# print "Unexpected error:", sys.exc_info()[0]
# print e
# print "Move on the the next solver"
r["number_of_cores"] = MPI.max(mpi_comm_world(), MPI.rank(
mpi_comm_world())) + 1
r["solution_time"] = MPI.sum(mpi_comm_world(),
timer.time() - t0) / (r["number_of_cores"])
displacement = probe.array()
probe.clear()
# Store results
if MPI.rank(mpi_comm_world()) == 0 and not load:
results.append(
(displacement[0, :], displacement[1, :], np.array(time)))
if not path.exists(r["case_path"]):
makedirs(r["case_path"])
results[-1][0].dump(path.join(r["case_path"], "dis_x.np"))
results[-1][1].dump(path.join(r["case_path"], "dis_y.np"))
results[-1][2].dump(path.join(r["case_path"], "time.np"))
a, L = lhs(F), rhs(F)
# Time-stepping
u_np1 = Function(V)
u_np1.rename("Temperature", "")
t = 0
# reference solution at t=0
u_ref = interpolate(u_D, V)
u_ref.rename("reference", " ")
# mark mesh w.r.t ranks
mesh_rank = MeshFunction("size_t", mesh, mesh.topology().dim())
if problem is ProblemType.NEUMANN:
mesh_rank.set_all(MPI.rank(MPI.comm_world) + 4)
else:
mesh_rank.set_all(MPI.rank(MPI.comm_world) + 0)
mesh_rank.rename("myRank", "")
# Generating output files
temperature_out = File("out/%s.pvd" % precice.get_participant_name())
ref_out = File("out/ref%s.pvd" % precice.get_participant_name())
error_out = File("out/error%s.pvd" % precice.get_participant_name())
ranks = File("out/ranks%s.pvd" % precice.get_participant_name())
# output solution and reference solution at t=0, n=0
n = 0
print('output u^%d and u_ref^%d' % (n, n))
temperature_out << u_n
ref_out << u_ref