ActiveCond3D Class

class electrical.shockley.ActiveCond3D(name='')

Finite element thermal solver for 3D Cartesian geometry.

Methods

compute([loops])	Run electrical calculations
get_capacitance()	Get the structure capacitance.
get_electrostatic_energy()	Get the energy stored in the electrostatic field in the analyzed structure.
get_total_current([nact])	Get total current flowing through active region (mA)
get_total_heat()	Get the total heat produced by the current flowing in the structure.
initialize()	Initialize solver.
invalidate()	Set the solver back to uninitialized state.

Attributes

Receivers

inTemperature

Receiver of the temperature required for computations [K].

Providers

outConductivity	Provider of the computed electrical conductivity [S/m].
outCurrentDensity	Provider of the computed current density [kA/cm²].
outHeat	Provider of the computed heat sources density [W/m³].
outPotential	Not available in this solver.
outVoltage	Provider of the computed voltage [V].

Other

algorithm	Chosen matrix factorization algorithm
cond	Junction conductivity function [S/m].
convergence	Convergence method.
empty_elements	Should empty regions (e.g. air) be included into computation domain?.
err	Maximum estimated error
geometry	Geometry provided to the solver
id	Id of the solver object.
initialized	True if the solver has been initialized.
iterative	Iterative matrix parameters (see IterativeParams)
maxerr	Limit for the potential updates
mesh	Mesh provided to the solver
ncond	Conductivity of the n-contact
pcond	Conductivity of the p-contact
pnjcond	Default effective conductivity of the active region.
start_cond	Default effective conductivity of the active region.
voltage_boundary	Boundary conditions of the first kind (constant potential)

Descriptions

Method Details

ActiveCond3D.compute(loops=0)

Run electrical calculations

ActiveCond3D.get_capacitance()

Get the structure capacitance.

Returns:

Total capacitance [pF].

Note

This method can only be used it there are exactly two boundary conditions specifying the voltage. Otherwise use get_electrostatic_energy() to obtain the stored energy $W$ and compute the capacitance as: $C = 2 , W / U^2$, where $U$ is the applied voltage.

ActiveCond3D.get_electrostatic_energy()

Get the energy stored in the electrostatic field in the analyzed structure.

Returns:

Total electrostatic energy [J].

ActiveCond3D.get_total_current(nact=0)

Get total current flowing through active region (mA)

ActiveCond3D.get_total_heat()

Get the total heat produced by the current flowing in the structure.

Returns:

Total produced heat (mW).

ActiveCond3D.initialize()

Initialize solver.

This method manually initialized the solver and sets initialized to True. Normally calling it is not necessary, as each solver automatically initializes itself when needed.

Returns:

solver initialized state prior to this method call.

Return type:

bool

ActiveCond3D.invalidate()

Set the solver back to uninitialized state.

This method frees the memory allocated by the solver and sets initialized to False.

Receiver Details

ActiveCond3D.inTemperature = <property object>

Receiver of the temperature required for computations [K].

You will find usage details in the documentation of the receiver class TemperatureReceiver3D.

Example

Connect the receiver to a provider from some other solver:

>>> solver.inTemperature = other_solver.outTemperature

See also

Receciver class: plask.flow.TemperatureReceiver3D

Provider class: plask.flow.TemperatureProvider3D

Data filter: plask.filter.TemperatureFilter3D

Provider Details

ActiveCond3D.outConductivity(mesh, interpolation='default') = <property object>

Provider of the computed electrical conductivity [S/m].

Parameters:

• mesh (mesh) – Target mesh to get the field at.

• interpolation (str) – Requested interpolation method.

Returns:

Data with the electrical conductivity on the specified mesh [S/m].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inConductivity = solver.outConductivity

Obtain the provided field:

>>> solver.outConductivity(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.ConductivityProvider3D

Receciver class: plask.flow.ConductivityReceiver3D

ActiveCond3D.outCurrentDensity(mesh, interpolation='default') = <property object>

Provider of the computed current density [kA/cm²].

Parameters:

• mesh (mesh) – Target mesh to get the field at.

• interpolation (str) – Requested interpolation method.

Returns:

Data with the current density on the specified mesh [kA/cm²].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inCurrentDensity = solver.outCurrentDensity

Obtain the provided field:

>>> solver.outCurrentDensity(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.CurrentDensityProvider3D

Receciver class: plask.flow.CurrentDensityReceiver3D

ActiveCond3D.outHeat(mesh, interpolation='default') = <property object>

Provider of the computed heat sources density [W/m³].

Parameters:

• mesh (mesh) – Target mesh to get the field at.

• interpolation (str) – Requested interpolation method.

Returns:

Data with the heat sources density on the specified mesh [W/m³].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inHeat = solver.outHeat

Obtain the provided field:

>>> solver.outHeat(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.HeatProvider3D

Receciver class: plask.flow.HeatReceiver3D

ActiveCond3D.outPotential = <property object>

Not available in this solver. Use outVoltage instead.

ActiveCond3D.outVoltage(mesh, interpolation='default') = <property object>

Provider of the computed voltage [V].

Parameters:

• mesh (mesh) – Target mesh to get the field at.

• interpolation (str) – Requested interpolation method.

Returns:

Data with the voltage on the specified mesh [V].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inVoltage = solver.outVoltage

Obtain the provided field:

>>> solver.outVoltage(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.VoltageProvider3D

Receciver class: plask.flow.VoltageReceiver3D

Attribute Details

ActiveCond3D.algorithm = <property object>

Chosen matrix factorization algorithm

ActiveCond3D.cond = <property object>

Junction conductivity function [S/m].

This function should take junction voltage (V), current density (kA/cm²) and temperature (K) as arguments and return a conductivity [S/m]. In case, there is more than one junction you may set such function for any of them by using cond# property, where # is the junction number (specified by a role junction# or active#).

Example

>>> def cond(U, j, T):
...     return 1e-3 * j**2 + 1e-4 * T**2
>>> solver.cond = cond

cond is an alias for cond0.

ActiveCond3D.convergence = <property object>

Convergence method.

If stable, covergence is slown down to ensure stability.

ActiveCond3D.empty_elements = <property object>

Should empty regions (e.g. air) be included into computation domain?

ActiveCond3D.err = <property object>

Maximum estimated error

ActiveCond3D.geometry = <property object>

Geometry provided to the solver

ActiveCond3D.id = <property object>

Id of the solver object. (read only)

Example

>>> mysolver.id
mysolver:category.type

ActiveCond3D.initialized = <property object>

True if the solver has been initialized. (read only)

Solvers usually get initialized at the beginning of the computations. You can clean the initialization state and free the memory by calling the invalidate() method.

ActiveCond3D.iterative = <property object>

Iterative matrix parameters (see IterativeParams)

ActiveCond3D.maxerr = <property object>

Limit for the potential updates

ActiveCond3D.mesh = <property object>

Mesh provided to the solver

ActiveCond3D.ncond = <property object>

Conductivity of the n-contact

ActiveCond3D.pcond = <property object>

Conductivity of the p-contact

ActiveCond3D.pnjcond = <property object>

Default effective conductivity of the active region.

Effective junction conductivity will be computed starting from this value. Note that the actual junction conductivity after convergence can be obtained with outConductivity.

ActiveCond3D.start_cond = <property object>

Default effective conductivity of the active region.

Effective junction conductivity will be computed starting from this value. Note that the actual junction conductivity after convergence can be obtained with outConductivity.

ActiveCond3D.voltage_boundary = <property object>

Boundary conditions of the first kind (constant potential)

This field holds a list of boundary conditions for the solver. You may access and alter its elements a normal Python list. Each element is a special class that has two attributes:

place	Boundary condition location (plask.mesh.RectangularBase3D.Boundary).
value	Boundary condition value.

When you add new boundary condition, you may use two-argument append, or prepend methods, or three-argument insert method, where you separately specify the place and the value. See the below example for clarification.

Example

>>> solver.voltage_boundary.clear()
>>> solver.voltage_boundary.append(solver.mesh.Bottom(), some_value)
>>> solver.voltage_boundary[0].value = different_value
>>> solver.voltage_boundary.insert(0, solver.mesh.Top(), new_value)
>>> solver.voltage_boundary[1].value == different_value
True