Sutherland

class Sutherland

Bases: Flow360BaseModel

Represents Sutherland’s law for calculating dynamic viscosity. This class implements Sutherland’s formula to compute the dynamic viscosity of a gas as a function of temperature.

Example

>>> fl.Sutherland(
...     reference_viscosity=1.70138e-5 * fl.u.Pa * fl.u.s,
...     reference_temperature=300.0 * fl.u.K,
...     effective_temperature=110.4 * fl.u.K,
... )

---

Attributes

reference_viscosity: ViscosityType.NonNegative

The reference dynamic viscosity at the reference temperature.

reference_temperature: AbsoluteTemperatureType

The reference temperature associated with the reference viscosity.

effective_temperature: AbsoluteTemperatureType

The effective temperature constant used in Sutherland’s formula.

Additional Constructors

classmethod from_file(filename)

Loads a Flow360BaseModel from .json, or .yaml file.

Parameters:

filename (str) – Full path to the .yaml or .json file to load the Flow360BaseModel from.

Returns:

An instance of the component class calling load.

Return type:

Flow360BaseModel

Example

>>> params = Flow360BaseModel.from_file(filename='folder/sim.json') 

Methods

get_dynamic_viscosity(temperature)

Calculates the dynamic viscosity at a given temperature using Sutherland’s law.

Parameters:

temperature (AbsoluteTemperatureType) – The temperature at which to calculate the dynamic viscosity.

Returns:

The calculated dynamic viscosity at the specified temperature.

Return type:

ViscosityType.NonNegative

help(methods=False)

Prints message describing the fields and methods of a Flow360BaseModel.

Parameters:

methods (bool = False) – Whether to also print out information about object’s methods.

Return type:

None

Example

>>> params.help(methods=True) 

to_file(filename, **kwargs)

Exports Flow360BaseModel instance to .json or .yaml file

Parameters:

filename (str) – Full path to the .json or .yaml or file to save the Flow360BaseModel to.

Return type:

None

Example

>>> params.to_file(filename='folder/flow360.json')