Thermal Non-Equilibrium Model Reference

The Thermal Non-Equilibrium model allows you to accurately capture temperature profiles and heating for situations where thermal non-equilibrium conditions appear.

Theory Thermal Non-Equilibrium Formulation
Provided by Continua > [physics continuum] > Models > Thermal Non-Equilibrium
Example Node Path Continua > Physics 1 > Models > Thermal Non-Equilibrium
Requires
  • Material: Gas or Multi-Component Gas
  • Flow: Coupled Flow
  • Equation of State: Thermal Non-Equilibrium Ideal Gas
NoteWhen you select the Thermal Non-Equilibrium Ideal Gas model in the model selection dialog and Auto-select recommended models is activated, the Thermal Non-Equilibrium model is selected automatically. The Thermal Non-Equilibrium Ideal Gas model requires this model.
Properties
  • Equalize Temperatures
  • Freeze Vibrational Temperature

See Thermal Non-Equilibrium Properties.
Activates Material Properties
  • Mode Relaxation Time
  • Vibrational Conductivity

See Material Properties.
Monitors
  • Vib. Energy
Field Functions
  • Combined Total Enthalpy
  • Mode Relaxation Time for [material]
  • Temperature of Vibrational Mode
  • Vibrational Enthalpy of [material]
  • Vibrational Specific Heat of [material]
  • Vibrational Specific Heat

See Field Functions.

Thermal Non-Equilibrium Properties

Equalize Temperatures
When On, forces the Vibrational-Electronic temperature to equal the Translational-Rotational temperature.

This option is useful for problems with a low degree of thermal non-equilibrium and can be used to overcome start-up problems that are associated with a poor initial condition. Turn it Off when the problem begins to converge towards a solution.

Freeze Vibrational Temperature
When On, freezes the Vibrational temperature at its current value.

This option is useful for problems with a large degree of thermal non-equilibrium and can be used to overcome start-up problems that are associated with a poor initial condition. Turn it Off when the problem begins to converge towards a solution.

Material Properties

Mode Relaxation Time
Provides the methods Landau-Teller and Inverse Mole-Fraction Average.
Vibrational Conductivity
Provides the method Non-Equilibrium Kinetic Theory.

Field Functions

Combined Total Enthalpy
Sum of total translational-rotational enthalpy with vibrational enthalpy.
Mode Relaxation Time
Relaxation time between the vibrational mode and translational mode.
Temperature of Vibrational Mode
Vibrational temperature (characteristic temperature of the vibrational/electronic modes).
Vibrational Conductivity
Thermal conductivity associated with the vibrational/electronic energy modes.
Vibrational Enthalpy of [material]
Energy associated with the vibrational and electronic energy modes.
Vibrational Specific Heat of [material]
Specific heat for the vibrational/electronic modes.