max_steps=100,
)
mag.create_mesh()
def initial_m(dof_name,coords):
print "DDD initial_M(dof_name=\"",dof_name,"\",coords=",coords,")\n"
dir=dof_name[1][0]
if dir==0:
return 0.0
elif dir==1:
return math.cos(2.0*math.pi*coords[0]/6.0)
else:
return math.sin(2.0*math.pi*coords[0]/6.0)
mag.set_magnetization(initial_m)
# mag.advance_time([0.0,0.0,0.0],time=0.001)
import nfem.visual
# nfem.visual.fields2vtkfile([mag.default_simulation_context.field_M],'data%05d.vtk' % 0,mesh=mag.default_simulation_context.mesh)
def print_field():
for i in range(1,299):
x=i*0.01
probed=mag.probe([x])
m_y_fe = 0.0
m_y_dy = 0.0
if len(probed)==2:
m_y_fe=probed[1][1][1]
mag.create_mesh()
def initial_m(dof_name, coords):
print "DDD initial_M(dof_name=\"", dof_name, "\",coords=", coords, ")\n"
dir = dof_name[1][0]
if dir == 0:
return 0.0
elif dir == 1:
return math.cos(2.0 * math.pi * coords[0] / 6.0)
else:
return math.sin(2.0 * math.pi * coords[0] / 6.0)
mag.set_magnetization(initial_m)
# mag.advance_time([0.0,0.0,0.0],time=0.001)
import nfem.visual
nfem.visual.fields2vtkfile([mag.default_simulation_context.field_M],
'data%05d.vtk' % 0,
mesh=mag.default_simulation_context.mesh)
def print_field():
for i in range(1, 299):
x = i * 0.01
probed = mag.probe([x])
m_y_fe = 0.0
mag.set_meshing_parameters(cache_name="two-balls")
mag.create_mesh()
def initial_M(dof_name, coords):
dir = dof_name[1][0]
if dir == 0:
return math.cos(coords[0])
elif dir == 1:
return math.sin(coords[0])
else:
return 0
mag.set_magnetization([1.0, 0.0, 0.0]) # may also provide a function here!
#mag.set_magnetization(initial_M) # may also provide a function here!
# NOTE: set_magnetization should also be able
# to take just a constant vector as an argument.
print "Total magnetization: ", mag.integrate()
f = open("data.dat", "w")
import nfem
import nfem.visual
frame = 0
mag.set_intensive_parameters([])
# mag.set_default_order(1) # default anyway...
mag.set_features({"demag":True,"exchange":True,"timestep":True}) # XXX change usage!
mat_Py = mag.MagMaterial("Py",Ms=1.0,A=13.0, # A = exchange constant
)
mag.defregion("Py", nm.ellipsoid([3.0,3.0,3.0]), mag_mat=mat_Py)
mag.set_meshing_parameters(cache_name="exchange-spring-mesh",
bounding_box=([-4.0,-4.0,-4.0],[4.0,4.0,4.0]),
a0=1.0,
max_steps=600,
)
mag.create_mesh()
mag.set_magnetization([0.0,0.0,1.0]) # providing a vector rather than a function
import nfem.visual
nfem.visual.fields2vtkfile([mag.default_simulation_context.field_M],'sphere-initial.vtk',mesh=mag.default_simulation_context.mesh)
mag.advance_time_cvode(0.02)
nfem.visual.fields2vtkfile([mag.default_simulation_context.field_M],'sphere-final.vtk',mesh=mag.default_simulation_context.mesh)
# mag.defregion("Ball 2",nm.shifted([ 3,0,0],sphere))
mag.set_meshing_parameters(cache_name="two-balls")
mag.create_mesh()
def initial_M(dof_name,coords):
dir=dof_name[1][0]
if dir==0:
return math.cos(coords[0])
elif dir==1:
return math.sin(coords[0])
else: return 0
mag.set_magnetization([1.0,0.0,0.0]) # may also provide a function here!
#mag.set_magnetization(initial_M) # may also provide a function here!
# NOTE: set_magnetization should also be able
# to take just a constant vector as an argument.
print "Total magnetization: ", mag.integrate()
f=open("data.dat","w")
import nfem
import nfem.visual
frame = 0
mag.create_mesh()
def initial_M(dof_name, coords):
dir = dof_name[1][0]
if dir == 0:
return math.cos(coords[0])
elif dir == 1:
return math.sin(coords[0])
else:
return 0
#mag.set_magnetization([1.0,0.0,0.0]) # may also provide a function here!
mag.set_magnetization(initial_M) # may also provide a function here!
# NOTE: set_magnetization should also be able
# to take just a constant vector as an argument.
print "Total magnetization: ", mag.integrate()
# XXXDDDXXXDDD
for n in range(1, 100):
print "T=", mag.default_simulation_context.timestepper.advance_time(
[0.0, 0.0, 0.0, 0.0, 0.0])
# this needs the intensive params!
# time.sleep(1000) # so we do not lose the dynamically generated C code...
# mag.defregion("Ball 1",nm.shifted([-3,0,0],sphere))
# mag.defregion("Ball 2",nm.shifted([ 3,0,0],sphere))
mag.set_meshing_parameters(cache_name="two-balls")
mag.create_mesh()
def initial_M(dof_name,coords):
dir=dof_name[1][0]
if dir==0:
return math.cos(coords[0])
elif dir==1:
return math.sin(coords[0])
else: return 0
#mag.set_magnetization([1.0,0.0,0.0]) # may also provide a function here!
mag.set_magnetization(initial_M) # may also provide a function here!
# NOTE: set_magnetization should also be able
# to take just a constant vector as an argument.
print "Total magnetization: ", mag.integrate()
# XXXDDDXXXDDD
for n in range(1,100):
print "T=",mag.default_simulation_context.timestepper.advance_time([0.0,0.0,0.0,0.0,0.0])
# this needs the intensive params!
# time.sleep(1000) # so we do not lose the dynamically generated C code...
