def update_sigma(the_field_sigma,i):
compute_J=nfem.prematrix_applicator(prematrix_J,
field_mid=the_field_sigma)
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=the_field_sigma)
#
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
field_J = nfem.cofield_to_field(compute_J(field_phi))
#print "field_J contents:", nfem.data_doftypes(field_J)
# XXX NOTE: we should be able to make an applicator that does the
# cofield_to_field conversion automatically!
#
#
# Next, let us compute the new condictivity by site-wise operation on
# field_J. We just overwrite field_sigma:
#
recompute_conductivity([h_x,h_y,sigma0,alpha],fields=[the_field_sigma,field_J])
print "Refcount field_sigma:",ocaml.sys_refcount(the_field_sigma)
return the_field_sigma
def update_sigma(the_field_sigma):
compute_J=nfem.prematrix_applicator(prematrix_J,
mwe_mid=the_field_sigma)
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=the_field_sigma)
#
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
field_J = nfem.cofield_to_field(compute_J(field_phi))
# XXX NOTE: we should be able to make an applicator that does the
# cofield_to_field conversion automatically!
#
#
# Next, let us compute the new condictivity by site-wise operation on
# field_J. We just overwrite field_sigma:
#
recompute_conductivity=nfem.site_wise_applicator(parameter_names=["H_x","H_y","sigma0","alpha"],
# all the names of extra parameters
code=code_recompute_conductivity,
fields=[the_field_sigma,field_J]
)
#
#
recompute_conductivity([h_x,h_y,sigma0,alpha])
return the_field_sigma
def update_sigma(the_field_sigma, i):
compute_J = nfem.prematrix_applicator(prematrix_J,
field_mid=the_field_sigma)
laplace_solver = nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1, 1, laplace_dbc)],
mwe_mid=the_field_sigma)
#
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
field_J = nfem.cofield_to_field(compute_J(field_phi))
#print "field_J contents:", nfem.data_doftypes(field_J)
# XXX NOTE: we should be able to make an applicator that does the
# cofield_to_field conversion automatically!
#
#
# Next, let us compute the new condictivity by site-wise operation on
# field_J. We just overwrite field_sigma:
#
recompute_conductivity([h_x, h_y, sigma0, alpha],
fields=[the_field_sigma, field_J])
nfem.visual.fields2vtkfile([field_phi, field_J, the_field_sigma],
'fem-rings2_all%d.vtk' % i, the_mesh)
return the_field_sigma
def compute_total_current(the_field_sigma):
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=the_field_sigma)
compute_div_J=nfem.prematrix_applicator(prematrix_laplace,
field_mid=the_field_sigma)
field_phi=laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
cofield_div_J=compute_div_J(field_phi)
return accumulate_J_total([0.0,0.0,0.0,0.0],cofields=[cofield_div_J])
def compute_total_current(the_field_sigma):
laplace_solver = nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1, 1, laplace_dbc)],
mwe_mid=the_field_sigma)
compute_div_J = nfem.prematrix_applicator(prematrix_laplace,
field_mid=the_field_sigma)
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
cofield_div_J = compute_div_J(field_phi)
return accumulate_J_total([0.0, 0.0, 0.0, 0.0], cofields=[cofield_div_J])
def compute_total_current(the_field_sigma):
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=the_field_sigma)
compute_div_J=nfem.prematrix_applicator(prematrix_laplace,
mwe_mid=the_field_sigma)
field_phi=laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
print "OK 1 - field_phi!\n"
sys.stdout.flush()
compute_div_J(field_phi, target=_cofield_div_J)
print "OK 2 - div_J!\n"
sys.stdout.flush()
return _accumulate_J_total([0.0,0.0,0.0,0.0])
print "unused laplace_dbc at x =", x, "and y =", y
raise StandardError, "this place can't be reached"
cofield_drho_by_dt = nfem.make_cofield(mwe_drho_by_dt)
print "1"
prematrix_laplace = nfem.prematrix(
diffop_laplace, mwe_drho_by_dt, mwe_phi, mwe_mid=mwe_sigma)
print "2"
prematrix_J = nfem.prematrix(diffop_J, mwe_J, mwe_phi, mwe_mid=mwe_sigma)
print "3"
compute_J = nfem.prematrix_applicator(prematrix_J, field_mid=field_sigma)
print "4"
laplace_solver = nfem.laplace_solver(
prematrix_laplace,
dirichlet_bcs=[(-1, 1, laplace_dbc)],
mwe_mid=field_sigma)
print "5"
field_phi = laplace_solver(cofield_drho_by_dt, dbc_values=laplace_dbc_values)
print "6"
field_J = nfem.cofield_to_field(compute_J(field_phi))
nfem.visual.fields2vtkfile([field_phi, field_J], 'result.vtk', the_mesh)
print "Try to visualise with "
print "mayavi -d run_bug-fem2-halfring/result.vtk -m SurfaceMap -m VelocityVector"
#This is " $\ laplace -phi = =rho_M$
prematrix_laplace = nfem.prematrix(diffop_laplace, mwe_rho_M, mwe_phi_M)
prematrix_div_M = nfem.prematrix(diffop_div_M,
mwe_rho_M,
mwe_M,
ignore_jumps=False)
prematrix_grad_phi = nfem.prematrix(diffop_grad_phi, mwe_H, mwe_phi_M)
log.info("OK 3!")
solve_bem = nfem.laplace_solver_bem(prematrix_laplace, inside_regions=[1])
log.info("OK 4!")
compute_div_M = nfem.prematrix_applicator(prematrix_div_M,
interface_coeffs=[(1, -1, 1.0)])
compute_grad_phi = nfem.prematrix_applicator(prematrix_grad_phi)
log.info("OK 5!")
field_M0 = nfem.make_field(mwe_M, fun_M0)
cofield_div_M = compute_div_M(field_M0)
# DDD
ddd_field_div_M = nfem.cofield_to_field(cofield_div_M)
print "DDD div M: ", nfem.probe_field(
ddd_field_div_M, [2.7, 0.2, 0.0]) # we may add: ,name_stem="rho_M")
# END DDD
field_phi_M = solve_bem(cofield_div_M)
diffop_grad_phi=nfem.diffop("<H(j)||d/dxj phi_M>, j:3")
log.info("OK 2!")
#This is " $\ laplace -phi = =rho_M$
prematrix_laplace=nfem.prematrix(diffop_laplace,mwe_rho_M,mwe_phi_M)
prematrix_div_M=nfem.prematrix(diffop_div_M,mwe_rho_M,mwe_M,ignore_jumps=False)
prematrix_grad_phi=nfem.prematrix(diffop_grad_phi,mwe_H,mwe_phi_M)
log.info("OK 3!")
solve_bem=nfem.laplace_solver_bem(prematrix_laplace,inside_regions=[1])
log.info("OK 4!")
compute_div_M=nfem.prematrix_applicator(prematrix_div_M,interface_coeffs=[(1,-1,1.0)])
compute_grad_phi=nfem.prematrix_applicator(prematrix_grad_phi)
log.info("OK 5!")
field_M0=nfem.make_field(mwe_M,fun_M0)
cofield_div_M=compute_div_M(field_M0)
# DDD
ddd_field_div_M=nfem.cofield_to_field(cofield_div_M)
print "DDD div M: ",nfem.probe_field(ddd_field_div_M,[2.7,0.2,0.0]) # we may add: ,name_stem="rho_M")
# END DDD
field_phi_M=solve_bem(cofield_div_M)
# Note that this magnetization is "mostly zero":
def fun_M0(dof_name_indices, position):
if dof_name_indices[1][0] == 1: # y-direction
x = position[0]
return 1.0 / (1.0 + (x * x / 4.0))
else:
return 0.0
field_M = nfem.make_field(mwe_M, fun_M0)
prematrix_v_laplace = nfem.prematrix(diffop_v_laplace, mwe_H, mwe_M)
v_laplace = nfem.prematrix_applicator(prematrix_v_laplace)
field_H = nfem.cofield_to_field(v_laplace(field_M))
range_i = 100
# nfem.field_print_contents(field_H)
for i in range(0, range_i):
pos = [-4.5 + 9.0 * i / (0.0 + range_i), 0.0, 0.0]
field_val = nfem.probe_field(field_H, "H", pos)
print pos[0], " ", field_val[1]
#for i in range(0,range_i):
# pos=[-4.5+9.0*i/(0.0+range_i),0.0,0.0]
# print pos, "=> ", nfem.probe_field(field_H,"H",pos)
diffop_v_laplace = nfem.diffop("-<d/dxj H(k) || d/dxj M(k)>, j:3, k:3")
# Note that this magnetization is "mostly zero":
def fun_M0(dof_name_indices,position):
if dof_name_indices[1][0]==1: # y-direction
x=position[0]
return 1.0/(1.0+(x*x/4.0))
else:
return 0.0
field_M=nfem.make_field(mwe_M,fun_M0)
prematrix_v_laplace=nfem.prematrix(diffop_v_laplace,mwe_H,mwe_M)
v_laplace=nfem.prematrix_applicator(prematrix_v_laplace)
field_H=nfem.cofield_to_field(v_laplace(field_M))
range_i=100
# nfem.field_print_contents(field_H)
for i in range(0,range_i):
pos=[-4.5+9.0*i/(0.0+range_i),0.0,0.0]
field_val=nfem.probe_field(field_H,"H",pos)
print pos[0], " ", field_val[1]
#for i in range(0,range_i):
# pos=[-4.5+9.0*i/(0.0+range_i),0.0,0.0]
elem2d_rho_M = nfem.make_element("rho_M",[],dim=2);
elem2d_phi_M = nfem.make_element("phi_M",[],dim=2);
mwe2d_M = nfem.make_mwe("mwe2d_M", [(1,elem2d_M)])
mwe2d_H = nfem.make_mwe("mwe2d_H", [(1,elem2d_H)])
mwe2d_rho_M = nfem.make_mwe("mwe2d_rho_M", [(1,elem2d_rho_M)])
mwe2d_phi_M = nfem.make_mwe("mwe2d_phi_M", [(1,elem2d_phi_M)])
#This is " $\ laplace -phi = =rho_M$
pmx2d_laplace=nfem.prematrix(diffop_laplace,mwe2d_rho_M,mwe2d_phi_M)
pmx2d_div_M=nfem.prematrix(diffop_div_M,mwe2d_rho_M,mwe2d_M,ignore_jumps=False)
pmx2d_grad_phi=nfem.prematrix(diffop_grad_phi,mwe2d_H,mwe2d_phi_M)
solve_bem_2d=nfem.laplace_solver_bem(pmx2d_laplace,inside_regions=[1], thickness=thickness2d)
compute_div_M_2d=nfem.prematrix_applicator(pmx2d_div_M,interface_coeffs=[(1,-1,1.0)])
compute_grad_phi_2d=nfem.prematrix_applicator(pmx2d_grad_phi)
field2d_M0=nfem.make_field(mwe2d_M,fun_M0)
cofield2d_div_M=compute_div_M_2d(field2d_M0)
field2d_phi_M=solve_bem_2d(cofield2d_div_M)
field2d_H=nfem.cofield_to_field(compute_grad_phi_2d(field2d_phi_M))
# DDDDDD
print "phi_M left: ",nfem.probe_field(field2d_phi_M,[-3.8,0.0])
print "phi_M right: ",nfem.probe_field(field2d_phi_M,[3.8,0.0])
def setup(self):
'''This function should be called after the method 'set' to setup
the simulation (create the fields, the operators and so on)'''
# Should not do initializizations more than once
if self.is_ready: return
mwe_m, field_m = self.new_mwe_and_field(
"m", [3], initial_values=self.initial_mag)
mwe_h_total, field_h_total = self.new_mwe_and_field("h_total", [3])
if self.features["include_demag"]:
self.new_field("h_demag", indices=[3])
if self.features["include_exchange"]:
self.new_field("h_exch", indices=[3])
if self.features["external_field"]:
h0 = self.features["external_field"]
self.new_field("h_ext", indices=[3], initial_values=h0)
# The demag field
if self.features["include_demag"]:
if self.mesh.dim != 3:
raise "Sorry, the demag-calculation is implemented only for 3-D space."
mwe_h_demag = self.mwes["h_demag"]
field_h_demag = self.fields["h_demag"]
mwe_scalar = self.new_mwe("scalar")
mwe_rho_m = nfem.mwe_sibling(mwe_scalar, "mwe_rho_m",
"renamed_scalar",
[("scalar", "rho_m")])
mwe_phi_m = nfem.mwe_sibling(mwe_scalar, "mwe_phi_m",
"renamed_scalar",
[("scalar", "phi_m")])
field_div_m = nfem.make_field(mwe_rho_m)
field_phi_m = nfem.make_field(mwe_phi_m)
diffop_div_m_str = "%f <rho_m||d/dxj m(j)>, j:3" % self.m_sat
print diffop_div_m_str
compute_div_m = \
nfem.diffop_applicator(diffop_div_m_str,
mwe_rho_m, mwe_m,
interface_coeffs=[(-2,-2,1.0)],
petsc_name="mumag_div_m")
prematrix_laplace = \
nfem.prematrix("-<d/dxj rho_m||d/dxj phi_m>, j:3", mwe_rho_m, mwe_phi_m)
solve_bem = \
nfem.laplace_solver_bem(prematrix_laplace, inside_regions=self.where)
compute_grad_phi = \
nfem.diffop_applicator("<h_demag(j)||d/dxj phi_m>, j:3",
mwe_h_demag, mwe_phi_m, result="field")
cofield_div_m = compute_div_m(self.fields["m"])
solve_bem(cofield_div_m, target=field_phi_m)
compute_grad_phi(field_phi_m, target=field_h_demag)
def calculate_h_demag():
compute_div_m(self.fields["m"], target=cofield_div_m)
solve_bem(cofield_div_m, target=field_phi_m)
compute_grad_phi(field_phi_m, target=field_h_demag)
self.calculate_h_demag = calculate_h_demag
# Now we add the exchange and demag fields if needed
if self.features["include_exchange"]:
if not self.features["exchange_coupling"]:
raise "You want to include exchange interaction, " + \
"but you did not specify the exchange coupling constant!"
ec = self.features["exchange_coupling"]
if ec < 0.0:
raise "Error: you specified a negative exchange coupling constant."
mwe_h_exch = self.mwes["h_exch"]
field_h_exch = self.fields["h_exch"]
exch_factor = -2.0 * ec / self.m_sat_mu0
op_str = "%f <d/dxi h_exch(j) || d/dxi m(j)>, i:%d, j:3" % (
exch_factor, self.mesh.dim)
op_h_exch = nfem.diffop(op_str)
p = nfem.prematrix(op_h_exch, mwe_h_exch, mwe_m, ignore_jumps=True)
compute_h_exch = nfem.prematrix_applicator(p)
h_exch_cofield = compute_h_exch(field_m)
nfem.cofield_to_field(h_exch_cofield, target=field_h_exch)
def calculate_h_exch():
compute_h_exch(field_m, target=h_exch_cofield)
nfem.cofield_to_field(h_exch_cofield, target=field_h_exch)
self.calculate_h_exch = calculate_h_exch
# Create the C-functions which performs the different parts
# of the computation
some_names = ["m", "h_total"]
some_mwes = self.mwe_list(some_names)
some_fields = self.field_list(some_names)
if self.uniaxial_anis:
args = ["m_sat_mu0", "axis_x", "axis_y", "axis_z", "k1", "k2"]
c_uniaxial = nfem.site_wise_applicator(args,
ccode_uniaxial,
field_mwes=some_mwes)
def calculate_uniaxial_anis():
for ua in self.uniaxial_anis:
axis, k1, k2 = ua
axis_x, axis_y, axis_z = axis
args_values = [
self.m_sat_mu0, axis_x, axis_y, axis_z, k1, k2
]
c_uniaxial(args_values, fields=some_fields)
self.calculate_uniaxial_anis = calculate_uniaxial_anis
if self.cubic_anis:
args = [
"m_sat_mu0", "axis1_x", "axis1_y", "axis1_z", "axis2_x",
"axis2_y", "axis2_z", "k1", "k2", "k3"
]
c_cubic = nfem.site_wise_applicator(args,
ccode_cubic,
field_mwes=some_mwes)
def calculate_cubic_anis():
for ca in self.cubic_anis:
axis1, axis2, k1, k2, k3 = ca
axis1_x, axis1_y, axis1_z = axis1
axis2_x, axis2_y, axis2_z = axis2
args_values = [
self.m_sat_mu0, axis1_x, axis1_y, axis1_z, axis2_x,
axis2_y, axis2_z, k1, k2, k3
]
c_cubic(args_values, fields=some_fields)
self.calculate_cubic_anis = calculate_cubic_anis
more_names = ["h_total", "h_ext", "h_demag", "h_exch"]
more_mwes = self.mwe_list(more_names)
more_fields = self.field_list(more_names)
add_fields = nfem.site_wise_applicator([],
ccode_add_fields,
field_mwes=more_mwes)
def add_ext_demag_exch():
add_fields([], fields=more_fields)
self.add_ext_demag_exch = add_ext_demag_exch
if self.features["calculate_energy"]:
swa_calculate_energy = \
nfem.site_wise_applicator(["energy"], ccode_calculate_energy,
field_mwes=[mwe_m],cofield_mwes=[mwe_h_total])
cofield_h_total = nfem.field_to_cofield(field_h_total)
def calculate_energy():
nfem.field_to_cofield(field_h_total, target=cofield_h_total)
energy = swa_calculate_energy([0.0],
fields=[field_m],
cofields=[cofield_h_total])
return -self.m_sat_mu0 * energy[0]
self.__calculate_energy = calculate_energy
self.is_ready = True
cofield_drho_by_dt=nfem.make_cofield(mwe_drho_by_dt)
print "1"
prematrix_laplace=nfem.prematrix(diffop_laplace,
mwe_drho_by_dt,mwe_phi,
mwe_mid=mwe_sigma)
print "2"
prematrix_J=nfem.prematrix(diffop_J,
mwe_J,mwe_phi,
mwe_mid=mwe_sigma)
print "3"
compute_J=nfem.prematrix_applicator(prematrix_J,
field_mid=field_sigma)
print "4"
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=field_sigma)
print "5"
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
print "6"
field_J = nfem.cofield_to_field(compute_J(field_phi))
nfem.visual.fields2vtkfile([field_phi,field_J],'result.vtk',the_mesh)
print "Try to visualise with "
print "mayavi -d run_bug-fem2-halfring/result.vtk -m SurfaceMap -m VelocityVector"
# surface outflow of electrical current!
code_recompute_conductivity="""
double len2_J, sprod_HJ, cos2;
double len2_H=H_x*H_x+H_y*H_y;
len2_J=J(0)*J(0)+J(1)*J(1);
sprod_HJ=H_x*J(0)+H_y*J(1);
cos2=(fabs(len2_J)<1e-8)?0.0:(sprod_HJ*sprod_HJ/(len2_H*len2_J));
sigma = sigma0 + alpha * cos2;
"""
compute_J=nfem.prematrix_applicator(prematrix_J,
mwe_mid=field_sigma)
compute_laplace=nfem.prematrix_applicator(prematrix_laplace,mwe_mid=field_sigma)
laplace_solver=nfem.laplace_solver(prematrix_laplace,
dirichlet_bcs=[(-1,1,laplace_dbc)],
mwe_mid=field_sigma)
field_phi = laplace_solver(cofield_drho_by_dt,
dbc_values=laplace_dbc_values)
nfem.plot_scalar_field(field_phi,
"phi","/tmp/plot-phi.ps",
plot_edges=False,
color_scheme=[(-1.2,[0.1,0.1,0.1]),
(-1.1,[0.9,0.9,0.9]),
total_current_up+=drho_by_dt;
}
else if(coords(1)<-2.45)
{
total_current_down+=drho_by_dt;
}
else
{
double j=drho_by_dt;
if(j>0)total_bad_current_plus+=j;
else total_bad_current_minus+=j;
}
"""
compute_div_J=nfem.prematrix_applicator(prematrix_div_J,
interface_coeffs=[(-1,1,1.0)])
# These definitions are to be regarded as internal to compute_total_current:
_cofield_div_J=nfem.make_cofield(mwe_drho_by_dt)
_accumulate_J_total=nfem.site_wise_applicator(parameter_names=["total_current_up",
"total_current_down",
"total_bad_current_plus",
"total_bad_current_minus"
],
code=code_integrate_div_J,
position_name="coords",
cofields=[_cofield_div_J])
def compute_total_current(the_field_J):
compute_div_J(the_field_J,target=_cofield_div_J)
def setup(self):
'''This function should be called after the method 'set' to setup
the simulation (create the fields, the operators and so on)'''
# Should not do initializizations more than once
if self.is_ready: return
mwe_m, field_m = self.new_mwe_and_field("m", [3], initial_values=self.initial_mag)
mwe_h_total, field_h_total = self.new_mwe_and_field("h_total", [3])
if self.features["include_demag"]:
self.new_field("h_demag", indices=[3])
if self.features["include_exchange"]:
self.new_field("h_exch", indices=[3])
if self.features["external_field"]:
h0 = self.features["external_field"]
self.new_field("h_ext", indices=[3], initial_values=h0)
# The demag field
if self.features["include_demag"]:
if self.mesh.dim != 3:
raise "Sorry, the demag-calculation is implemented only for 3-D space."
mwe_h_demag = self.mwes["h_demag"]
field_h_demag = self.fields["h_demag"]
mwe_scalar = self.new_mwe("scalar")
mwe_rho_m = nfem.mwe_sibling(mwe_scalar, "mwe_rho_m", "renamed_scalar", [("scalar", "rho_m")])
mwe_phi_m = nfem.mwe_sibling(mwe_scalar, "mwe_phi_m", "renamed_scalar", [("scalar", "phi_m")])
field_div_m = nfem.make_field(mwe_rho_m)
field_phi_m = nfem.make_field(mwe_phi_m)
diffop_div_m_str = "%f <rho_m||d/dxj m(j)>, j:3" % self.m_sat
print diffop_div_m_str
compute_div_m = \
nfem.diffop_applicator(diffop_div_m_str,
mwe_rho_m, mwe_m,
interface_coeffs=[(-2,-2,1.0)],
petsc_name="mumag_div_m")
prematrix_laplace = \
nfem.prematrix("-<d/dxj rho_m||d/dxj phi_m>, j:3", mwe_rho_m, mwe_phi_m)
solve_bem = \
nfem.laplace_solver_bem(prematrix_laplace, inside_regions=self.where)
compute_grad_phi = \
nfem.diffop_applicator("<h_demag(j)||d/dxj phi_m>, j:3",
mwe_h_demag, mwe_phi_m, result="field")
cofield_div_m = compute_div_m(self.fields["m"])
solve_bem(cofield_div_m, target=field_phi_m)
compute_grad_phi(field_phi_m, target=field_h_demag)
def calculate_h_demag():
compute_div_m(self.fields["m"], target=cofield_div_m)
solve_bem(cofield_div_m, target=field_phi_m)
compute_grad_phi(field_phi_m, target=field_h_demag)
self.calculate_h_demag = calculate_h_demag
# Now we add the exchange and demag fields if needed
if self.features["include_exchange"]:
if not self.features["exchange_coupling"]:
raise "You want to include exchange interaction, " + \
"but you did not specify the exchange coupling constant!"
ec = self.features["exchange_coupling"]
if ec < 0.0:
raise "Error: you specified a negative exchange coupling constant."
mwe_h_exch = self.mwes["h_exch"]
field_h_exch = self.fields["h_exch"]
exch_factor = -2.0*ec/self.m_sat_mu0
op_str = "%f <d/dxi h_exch(j) || d/dxi m(j)>, i:%d, j:3" % (exch_factor, self.mesh.dim)
op_h_exch = nfem.diffop(op_str)
p = nfem.prematrix(op_h_exch, mwe_h_exch, mwe_m, ignore_jumps=True)
compute_h_exch = nfem.prematrix_applicator(p)
h_exch_cofield = compute_h_exch(field_m)
nfem.cofield_to_field(h_exch_cofield, target=field_h_exch)
def calculate_h_exch():
compute_h_exch(field_m, target=h_exch_cofield)
nfem.cofield_to_field(h_exch_cofield, target=field_h_exch)
self.calculate_h_exch = calculate_h_exch
# Create the C-functions which performs the different parts
# of the computation
some_names = ["m", "h_total"]
some_mwes = self.mwe_list(some_names)
some_fields = self.field_list(some_names)
if self.uniaxial_anis:
args = ["m_sat_mu0", "axis_x", "axis_y", "axis_z", "k1", "k2"]
c_uniaxial = nfem.site_wise_applicator(args, ccode_uniaxial, field_mwes=some_mwes)
def calculate_uniaxial_anis():
for ua in self.uniaxial_anis:
axis, k1, k2 = ua
axis_x, axis_y, axis_z = axis
args_values = [self.m_sat_mu0, axis_x, axis_y, axis_z, k1, k2]
c_uniaxial(args_values, fields=some_fields)
self.calculate_uniaxial_anis = calculate_uniaxial_anis
if self.cubic_anis:
args = ["m_sat_mu0", "axis1_x", "axis1_y", "axis1_z",
"axis2_x", "axis2_y", "axis2_z", "k1", "k2", "k3"]
c_cubic = nfem.site_wise_applicator(args, ccode_cubic, field_mwes=some_mwes)
def calculate_cubic_anis():
for ca in self.cubic_anis:
axis1, axis2, k1, k2, k3 = ca
axis1_x, axis1_y, axis1_z = axis1
axis2_x, axis2_y, axis2_z = axis2
args_values = [self.m_sat_mu0, axis1_x, axis1_y, axis1_z,
axis2_x, axis2_y, axis2_z, k1, k2, k3]
c_cubic(args_values, fields=some_fields)
self.calculate_cubic_anis = calculate_cubic_anis
more_names = ["h_total", "h_ext", "h_demag", "h_exch"]
more_mwes = self.mwe_list(more_names)
more_fields = self.field_list(more_names)
add_fields = nfem.site_wise_applicator([], ccode_add_fields, field_mwes=more_mwes)
def add_ext_demag_exch():
add_fields([], fields=more_fields)
self.add_ext_demag_exch = add_ext_demag_exch
if self.features["calculate_energy"]:
swa_calculate_energy = \
nfem.site_wise_applicator(["energy"], ccode_calculate_energy,
field_mwes=[mwe_m],cofield_mwes=[mwe_h_total])
cofield_h_total = nfem.field_to_cofield(field_h_total)
def calculate_energy():
nfem.field_to_cofield(field_h_total, target=cofield_h_total)
energy = swa_calculate_energy([0.0], fields=[field_m], cofields=[cofield_h_total])
return -self.m_sat_mu0*energy[0]
self.__calculate_energy = calculate_energy
self.is_ready = True
