Section: transport

This section is for setting thermal and momentum diffusivity coefficients.

transport.model

type: String, optional, default = ConstTransport

The implemented transport model are ConstTransport and TwoPhaseTransport.

transport.viscosity

type: Real, optional, default = 1.0e-5

Sets the dynamic viscosity

transport.laminar_prandtl

type: Real, optional, default = 1.0

Sets the laminar Prandtl number.

transport.turbulent_prandtl

type: Real, optional, default = 1.0

Sets the turbulent Prandtl number.

transport.reference_temperature

type: Real, mandatory

Reference temperature \(\theta_\mathrm{ref}\) in Kelvin. Values of the temperature field that are less than or greater than this value will cause a buoyancy force in the direction of the gravity vector.

transport.thermal_expansion_coefficient

type: Real, optional, default \(\beta = 1 / \theta_\mathrm{ref}\)

Thermal expansion coefficient, if not specified this value is set to the inverse of the transport.reference_temperature value.