# Dynamic2D Class¶

class thermal.dynamic.Dynamic2D(name="")

Finite element thermal solver for 2D Cartesian geometry.

## Methods¶

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

## Attributes¶

 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. include_empty Should empty regions (e.g. 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¶

Dynamic2D.compute(time)

Run thermal calculations

Dynamic2D.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. bool
Dynamic2D.invalidate()

Set the solver back to uninitialized state.

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

Dynamic2D.inHeat

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

You will find usage details in the documentation of the receiver class HeatReceiver2D.

Example

Connect the reveiver to a provider from some other solver:

>>> solver.inHeat = other_solver.outHeat


Receciver class: plask.flow.HeatReceiver2D

Provider class: plask.flow.HeatProvider2D

Data filter: plask.filter.HeatFilter2D

### Provider Details¶

Dynamic2D.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. 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)

Dynamic2D.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. 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)

Dynamic2D.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. 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)


### Attribute Details¶

Dynamic2D.algorithm

Chosen matrix factorization algorithm

Dynamic2D.elapsed_time

Alias for time (obsolete).

Dynamic2D.geometry

Geometry provided to the solver

Dynamic2D.id

Id of the solver object. (read only)

Example

>>> mysolver.id
mysolver:category.type

Dynamic2D.include_empty

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

Dynamic2D.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.

Dynamic2D.inittemp

Initial temperature [K]

Dynamic2D.logfreq

Frequency of iteration progress reporting

Dynamic2D.lumping

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

Dynamic2D.mesh

Mesh provided to the solver

Dynamic2D.methodparam

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

Dynamic2D.rebuildfreq

Frequency of rebuild mass

Dynamic2D.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.RectangularBase2D.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

Dynamic2D.time

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

Dynamic2D.timestep

Time step [ns]