ThinCurr Class Reference

Detailed Description

ThinCurr thin-wall eddy current model class.

Public Member Functions
	__init__ (self, debug_level=0, nthreads=2)
	Initialize ThinCurr object.
	build_reduced_model (self, basis_set, filename='tCurr_reduced.h5', compute_B=False, sensor_obj=c_void_p())
	Build reduced model by projecting full model onto defined basis set of currents.
	build_XDMF (self, repeat_static=False, pretty=False)
	Build XDMF plot metadata files for model.
	compute_Bmat (self, cache_file=None)
	Compute magnetic field reconstruction operators for this model.
	compute_freq_response (self, fdriver=None, vdriver=None, freq=0.0, fr_limit=0, direct=False)
	Compute frequence response of the current model to given driver voltages.
	compute_Lmat (self, cache_file=None, use_hodlr=False)
	Compute the self-inductance matrix for this model.
	compute_Mcoil (self, cache_file=None)
	Compute the mutual inductance between passive (mesh+vcoils) and active elements (icoils)
	compute_Msensor (self, sensor_file, cache_file=None)
	Compute the mutual inductance between model and sensors.
	compute_Rmat (self, copy_out=False)
	Compute the resistance matrix for this model.
	cross_coupling (self, model2, cache_file=None)
	Compute the mutual inductance between this and another ThinCurr model.
	cross_eval (self, model2, field)
	Compute the voltage/flux induced on another ThinCurr model from a current structure on this model.
	get_eigs (self, neigs, direct=False)
	Compute eigenmodes of this model.
	get_regmat (self)
	Compute the current regularization matrix for this model.
	plot_td (self, nsteps, compute_B=False, rebuild_sensors=False, plot_freq=10, sensor_obj=c_void_p())
	Perform a time-domain simulation.
	reconstruct_Bfield (self, potential, coil_currs=None)
	Reconstruct magnetic field on original grid.
	reconstruct_current (self, potential, centering='cell')
	Reconstruct current field on mesh.
	run_td (self, dt, nsteps, coil_currs=None, coil_volts=None, direct=False, status_freq=10, plot_freq=10, sensor_obj=c_void_p(), lin_tol=1.E-6, timestep_cn=True)
	Perform a time-domain simulation.
	save_current (self, potential, tag)
	Save current field from ThinCurr to plot files.
	save_scalar (self, field, tag)
	Save scalar field to plot files.
	scale_va (self, data, div_flag=False)
	Scale a vertex array by vertex areas (eg.
	setup_io (self, basepath=None, save_debug=False)
	Setup XDMF+HDF5 I/O for 3D visualization.
	setup_model (self, r=None, lc=None, reg=None, mesh_file=None, pmap=None, xml_filename=None, jumper_start=-1)
	Setup ThinCurr model.

Public Attributes
	lc
	Mesh triangles [nc,3].
	Lmat
	Model inductance matrix (dense)
	Lmat_hodlr
	Model inductance matrix (HODLR)
	n_icoils
	Number of V-coil elements in the thin-wall model.
	n_vcoils
	Number of V-coil elements in the thin-wall model.
	nc
	Number of cells in mesh.
	ne
	Number of edges in mesh.
	nelems
	Total number of active DOFs in the thin-wall model.
	nholes
	Number of hole elements in the thin-wall model.
	np
	Number of points in mesh.
	np_active
	Number of vertices that are active in the thin-wall model.
	nregs
	Number of regions in mesh.
	r
	Mesh vertices [np,3] (last column should be all zeros)
	reg
	Mesh regions [nc].
	Rmat
	Model resistance matrix.
	tw_obj
	Thin-wall model object.

Protected Member Functions
	_update_psin (self)
	Update input file (oftpyin) with current settings.

Protected Attributes
	_io_basepath
	I/O basepath for plotting/XDMF output.
	_psin_dict
	Input file settings.
	_xml_ptr
	Pointer to XML element in Fortran (FoX)

Constructor & Destructor Documentation

__init__()

__init__	(		self,
			debug_level = 0,
			nthreads = 2
	)

Initialize ThinCurr object.

Parameters

debug_level

Level of debug printing (0-3)

Member Function Documentation

_update_psin()

_update_psin (   self )

protected

Update input file (oftpyin) with current settings.

build_reduced_model()

build_reduced_model	(		self,
			basis_set,
			filename = 'tCurr_reduced.h5',
			compute_B = False,
			sensor_obj = c_void_p()
	)

Build reduced model by projecting full model onto defined basis set of currents.

Parameters

basis_set	Basis set for projection (nBasis,:)
filename	Filename for saving reduced model
compute_B	Compute B-field reconstruction operators for reduced model?
sensor_obj	Sensor object to use

Returns

Reduced model (see ThinCurr_reduced)

build_XDMF()

build_XDMF	(		self,
			repeat_static = False,
			pretty = False
	)

Build XDMF plot metadata files for model.

Parameters

repeat_static	Repeat static fields (0-th timestep) in all timesteps?
pretty	Use pretty printing (indentation) in XDMF files?

compute_Bmat()

compute_Bmat	(		self,
			cache_file = None
	)

Compute magnetic field reconstruction operators for this model.

Parameters

cache_file

Path to cache file to store/load matrix

Returns

Element B-field reconstruction matrix ((:,:) if HODLR is available else None)

Icoil B-field reconstruction matrix (:,:)

compute_freq_response()

compute_freq_response	(		self,
			fdriver = None,
			vdriver = None,
			freq = 0.0,
			fr_limit = 0,
			direct = False
	)

Compute frequence response of the current model to given driver voltages.

Parameters

fdriver	Real/Imaginary driver flux pair (M*I)
vdriver	Real/Imaginary driver voltage pair
freq	Frequency for response calculation [Hz] (unused if fr_limit!=0)
fr_limit	Frequency limit for calculation (0: none, 1: inductive, 2: resistive)
direct	Use direct solver?

Returns

Real/Imaginary eddy current response

compute_Lmat()

compute_Lmat	(		self,
			cache_file = None,
			use_hodlr = False
	)

Compute the self-inductance matrix for this model.

Parameters

cache_file	Path to cache file to store/load matrix
use_hodlr	Use HODLR compression for the matrix

Returns

Self-inductance matrix ((:,:) if use_hodlr=False else reference to HODLR object)

compute_Mcoil()

compute_Mcoil	(		self,
			cache_file = None
	)

Compute the mutual inductance between passive (mesh+vcoils) and active elements (icoils)

Parameters

cache_file

Path to cache file to store/load matrix

Returns

Mutual inductance matrix (:,:)

compute_Msensor()

compute_Msensor	(		self,
			sensor_file,
			cache_file = None
	)

Compute the mutual inductance between model and sensors.

Parameters

sensor_file	Path to file contatining flux loop definitions
cache_file	Path to cache file to store/load matrix

Returns

Mutual inductance matrix between model and sensors (:,:)

Mutual inductance matrix between icoils and sensors (:,:)

Internal ThinCurr sensor object

compute_Rmat()

compute_Rmat	(		self,
			copy_out = False
	)

Compute the resistance matrix for this model.

Parameters

copy_out

Copy matrix to python and store in self.Rmat?

cross_coupling()

cross_coupling	(		self,
			model2,
			cache_file = None
	)

Compute the mutual inductance between this and another ThinCurr model.

Parameters

model2	The second model for mutual calculation
cache_file	Path to cache file to store/load matrix

Returns

Mutual inductance matrix (:,:)

cross_eval()

cross_eval	(		self,
			model2,
			field
	)

Compute the voltage/flux induced on another ThinCurr model from a current structure on this model.

Parameters

model2	The second model for mutual calculation
field	One or more current fields

Returns

Flux on model2 from field on self (field.shape[0],:)

get_eigs()

get_eigs	(		self,
			neigs,
			direct = False
	)

Compute eigenmodes of this model.

Parameters

neigs	Number of eigenvalues to compute
direct	Use direct solver?

Returns

Eigenvalues (neigs)

Eigenvectors (neigs,:)

get_regmat()

get_regmat

(

self

)

Compute the current regularization matrix for this model.

Returns

Regularization matrix (:,:)

plot_td()

plot_td	(		self,
			nsteps,
			compute_B = False,
			rebuild_sensors = False,
			plot_freq = 10,
			sensor_obj = c_void_p()
	)

Perform a time-domain simulation.

Parameters

nsteps	Number of steps to take
compute_B	Compute B-field on grid vertices
rebuild_sensors	Recompute sensor signals (overwriting if present)
plot_freq	Frequency to load plot files
sensor_obj	Sensor object to use

reconstruct_Bfield()

reconstruct_Bfield	(		self,
			potential,
			coil_currs = None
	)

Reconstruct magnetic field on original grid.

Parameters

weights	Reduced model basis weights
coil_currs	Coil currents [A]

Returns

Magnetic field on original grid (:,3)

reconstruct_current()

reconstruct_current	(		self,
			potential,
			centering = 'cell'
	)

Reconstruct current field on mesh.

Parameters

potential	Current potential
centering	Desired field centering ('cell', 'vertex')

Returns

Current field on selected centering (:,3)

run_td()

run_td	(		self,
			dt,
			nsteps,
			coil_currs = None,
			coil_volts = None,
			direct = False,
			status_freq = 10,
			plot_freq = 10,
			sensor_obj = c_void_p(),
			lin_tol = 1.E-6,
			timestep_cn = True
	)

Perform a time-domain simulation.

Parameters

dt	Time step for simulation
nsteps	Number of steps to take
coil_currs	Current vs time array for Icoils (:,n_icoils+1) (first column is time)
coil_volts	Voltage vs time array for Vcoils (:,n_vcoils+1) (first column is time)
direct	Use direct solver?
status_freq	Frequency to print status information
plot_freq	Frequency to save plot files
sensor_obj	Sensor object to use
lin_tol	Tolerance for linear solver when direct=False
timestep_cn	Use Crank-Nicolson timestep?

save_current()

save_current	(		self,
			potential,
			tag
	)

Save current field from ThinCurr to plot files.

Parameters

potential	Current potential to save
tag	Name of field in plot files

save_scalar()

save_scalar	(		self,
			field,
			tag
	)

Save scalar field to plot files.

Parameters

field	Pointwise data to save
tag	Name of field in plot files

scale_va()

scale_va	(		self,
			data,
			div_flag = False
	)

Scale a vertex array by vertex areas (eg.

B_n -> flux)

Parameters

data	Data to scale
div_flag	Divide by vertex areas instead?

Returns

Scaled data (:)

setup_io()

setup_io	(		self,
			basepath = None,
			save_debug = False
	)

Setup XDMF+HDF5 I/O for 3D visualization.

Parameters

basepath	Path to root directory to use for I/O
save_debug	Save model debug information?

setup_model()

setup_model	(		self,
			r = None,
			lc = None,
			reg = None,
			mesh_file = None,
			pmap = None,
			xml_filename = None,
			jumper_start = -1
	)

Setup ThinCurr model.

Parameters

r	Point list (np,3)
lc	Cell list (nc,3)
reg	Region tag (nc,)
mesh_file	File containing model in native mesh format
pmap	Point map for periodic grids
xml_filename	Path to XML file for model

Member Data Documentation

_io_basepath

_io_basepath

protected

I/O basepath for plotting/XDMF output.

_psin_dict

_psin_dict

protected

Input file settings.

_xml_ptr

_xml_ptr

protected

Pointer to XML element in Fortran (FoX)

lc

lc

Mesh triangles [nc,3].

Lmat

Lmat

Model inductance matrix (dense)

Lmat_hodlr

Lmat_hodlr

Model inductance matrix (HODLR)

n_icoils

n_icoils

Number of V-coil elements in the thin-wall model.

n_vcoils

n_vcoils

Number of V-coil elements in the thin-wall model.

nc

nc

Number of cells in mesh.

ne

ne

Number of edges in mesh.

nelems

nelems

Total number of active DOFs in the thin-wall model.

nholes

nholes

Number of hole elements in the thin-wall model.

np

np

Number of points in mesh.

np_active

np_active

Number of vertices that are active in the thin-wall model.

nregs

nregs

Number of regions in mesh.

r

r

Mesh vertices [np,3] (last column should be all zeros)

reg

reg

Mesh regions [nc].

Rmat

Rmat

Model resistance matrix.

tw_obj

tw_obj

Thin-wall model object.

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The documentation for this class was generated from the following file:

• /home/runner/work/OpenFUSIONToolkit/OpenFUSIONToolkit/src/python/OpenFUSIONToolkit/ThinCurr/_core.py