T_old=T
#======= solve for velovity ====================================================================
eta_N=exp(Ar*((1.+V_REF*(1-Function(dom).getX()[DIM-1]))/(T_OFFSET_REF+interpolate(T,Function(dom)))-1./T_OFFSET_REF))
print("viscosity range :", inf(eta_N), sup(eta_N))
flow.setPowerLaws([eta_N, eta_N ], [ 1., TAU_0], [1,N])
flow.setExternals(F=Ra*T*unitVector(DIM-1,DIM))
# if dt<=0 or not CREATE_TOPOGRAPHY:
if not CREATE_TOPOGRAPHY:
flow.update(dt, iter_max=100, verbose=False)
else:
topography_last=topography
Topo_norm, error_Topo=1,1
i=0
print("DDDDD : ====",dt)
while error_Topo > TOPO_TOL * Topo_norm:
flow.setStatus(t, v_old, p_old, stress_old)
flow.setExternals(f=-SURFACE_LOAD*(topography-dt*v)*unitVector(DIM-1,DIM)*top_boundary_mask, restoration_factor=SURFACE_LOAD*dt*top_boundary_mask)
flow.update(dt, iter_max=100, verbose=False)
v=flow.getVelocity()
mts.setTopography(topography_old)
mts.setVelocity(v)
topography_last, topography=topography, mts.update(dt, allow_substeps=True)
error_Topo=sqrt(integrate(((topography-topography_last)*top_boundary_mask)**2))
Topo_norm=sqrt(integrate((topography*top_boundary_mask)**2))
print("DDDDD :", "input=",integrate(v*top_boundary_mask)[DIM-1],"output=", integrate(topography*top_boundary_mask)/Lsup(topography), error_Topo, Topo_norm)
print("topography update step %s error = %e, norm = %e."%(i, error_Topo, Topo_norm), Lsup(v))
i+=1
if i > TOPO_ITER_MAX:
raise RuntimeError("topography did not converge after %s steps."%TOPO_ITER_MAX)
v=flow.getVelocity()
for d in range(DIM):
Ar *
((1. + V_REF * (1 - Function(dom).getX()[DIM - 1])) /
(T_OFFSET_REF + interpolate(T, Function(dom))) - 1. / T_OFFSET_REF))
print("viscosity range :", inf(eta_N), sup(eta_N))
flow.setPowerLaws([eta_N, eta_N], [1., TAU_0], [1, N])
flow.setExternals(F=Ra * T * unitVector(DIM - 1, DIM))
# if dt<=0 or not CREATE_TOPOGRAPHY:
if not CREATE_TOPOGRAPHY:
flow.update(dt, iter_max=100, verbose=False)
else:
topography_last = topography
Topo_norm, error_Topo = 1, 1
i = 0
print("DDDDD : ====", dt)
while error_Topo > TOPO_TOL * Topo_norm:
flow.setStatus(t, v_old, p_old, stress_old)
flow.setExternals(f=-SURFACE_LOAD * (topography - dt * v) *
unitVector(DIM - 1, DIM) * top_boundary_mask,
restoration_factor=SURFACE_LOAD * dt *
top_boundary_mask)
flow.update(dt, iter_max=100, verbose=False)
v = flow.getVelocity()
mts.setTopography(topography_old)
mts.setVelocity(v)
topography_last, topography = topography, mts.update(
dt, allow_substeps=True)
error_Topo = sqrt(
integrate(
((topography - topography_last) * top_boundary_mask)**2))
Topo_norm = sqrt(integrate((topography * top_boundary_mask)**2))
print("DDDDD :", "input=",
