PLaSK User Manual

Dynamic3D Class

class thermal.dynamic.Dynamic3D(name="")

Finite element thermal solver for 3D Cartesian geometry.

Methods

compute(time) Run thermal calculations
initialize() Initialize solver.
invalidate() Set the solver back to uninitialized state.

Attributes

Receivers

inHeat Receiver of the heat sources density required for computations [W/m³].

Providers

outHeatFlux Provider of the computed heat flux [W/m²].
outTemperature Provider of the computed temperature [K].
outThermalConductivity Provider of the computed thermal conductivity [W/(m×K)].

Other

algorithm Chosen matrix factorization algorithm
elapsed_time Alias for time (obsolete).
geometry Geometry provided to the solver
id Id of the solver object.
initialized True if the solver has been initialized.
inittemp Initial temperature [K]
logfreq Frequency of iteration progress reporting
lumping Chosen mass matrix type from lumped or non-lumped (consistent)
mesh Mesh provided to the solver
methodparam Initial parameter determining the calculation method – 0.5 - Crank-Nicolson method, 0 - explicit method, 1 - implicit method
rebuildfreq Frequency of rebuild mass
temperature_boundary Boundary conditions for the constant temperature
time Time of calculations performed so far since the last solver invalidation.
timestep Time step [ns]

Descriptions

Method Details

Dynamic3D.compute(time)

Run thermal calculations

Dynamic3D.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
Dynamic3D.invalidate()

Set the solver back to uninitialized state.

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

Receiver Details

Dynamic3D.inHeat

Receiver of the heat sources density required for computations [W/m³].

You will find usage details in the documentation of the receiver class HeatReceiver3D.

Example

Connect the reveiver to a provider from some other solver:

>>> solver.inHeat = other_solver.outHeat

See also

Receciver class: plask.flow.HeatReceiver3D

Provider class: plask.flow.HeatProvider3D

Data filter: plask.filter.HeatFilter3D

Provider Details

Dynamic3D.outHeatFlux(mesh, interpolation='default')

Provider of the computed heat flux [W/m²].

Parameters:
  • mesh (mesh) – Target mesh to get the field at.
  • interpolation (str) – Requested interpolation method.
Returns:

Data with the heat flux on the specified mesh [W/m²].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inHeatFlux = solver.outHeatFlux

Obtain the provided field:

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

See also

Provider class: plask.flow.HeatFluxProvider3D

Receciver class: plask.flow.HeatFluxReceiver3D

Dynamic3D.outTemperature(mesh, interpolation='default')

Provider of the computed temperature [K].

Parameters:
  • mesh (mesh) – Target mesh to get the field at.
  • interpolation (str) – Requested interpolation method.
Returns:

Data with the temperature on the specified mesh [K].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inTemperature = solver.outTemperature

Obtain the provided field:

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

See also

Provider class: plask.flow.TemperatureProvider3D

Receciver class: plask.flow.TemperatureReceiver3D

Dynamic3D.outThermalConductivity(mesh, interpolation='default')

Provider of the computed thermal conductivity [W/(m×K)].

Parameters:
  • mesh (mesh) – Target mesh to get the field at.
  • interpolation (str) – Requested interpolation method.
Returns:

Data with the thermal conductivity on the specified mesh [W/(m×K)].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inThermalConductivity = solver.outThermalConductivity

Obtain the provided field:

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

Attribute Details

Dynamic3D.algorithm

Chosen matrix factorization algorithm

Dynamic3D.elapsed_time

Alias for time (obsolete).

Dynamic3D.geometry

Geometry provided to the solver

Dynamic3D.id

Id of the solver object. (read only)

Example

>>> mysolver.id
mysolver:category.type
Dynamic3D.initialized

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.

Dynamic3D.inittemp

Initial temperature [K]

Dynamic3D.logfreq

Frequency of iteration progress reporting

Dynamic3D.lumping

Chosen mass matrix type from lumped or non-lumped (consistent)

Dynamic3D.mesh

Mesh provided to the solver

Dynamic3D.methodparam

Initial parameter determining the calculation method – 0.5 - Crank-Nicolson method, 0 - explicit method, 1 - implicit method

Dynamic3D.rebuildfreq

Frequency of rebuild mass

Dynamic3D.temperature_boundary

Boundary conditions for the constant temperature

This field holds a list of boundary conditions for the solver. You may access and alter is 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.temperature_boundary.clear()
>>> solver.temperature_boundary.append(solver.mesh.Bottom(), some_value)
>>> solver.temperature_boundary[0].value = different_value
>>> solver.temperature_boundary.insert(0, solver.mesh.Top(), new_value)
>>> solver.temperature_boundary[1].value == different_value
True
Dynamic3D.time

Time of calculations performed so far since the last solver invalidation.

Dynamic3D.timestep

Time step [ns]