Ansys Learning Forum Forums Discuss Simulation Fluids Thermal Phase Change Reply To: Thermal Phase Change

SRP
Ansys Employee

Hi,

The TPC (Thermal Phase Change) model works in the Eulerian multiphase framework. It applies the two-resistance approach where a separate heat transfer process is considered for either side of the phase-interface with different heat transfer coefficients. The thermal phase change model uses scaling factors (Cl and Cv) to calculate the heat transfer from the interface to the liquid phase or gas phase. The default value is 1.

You can refer to fluent theory guide to understand equations used in the background: 14.7.5. Evaporation-Condensation Model (ansys.com)

The zero resistance is equivalent to an infinite phase specific heat transfer coefficient. For example, if  its effect is to force the interface temperature to be the same as the phase temperature.

For more details, please check fluent theory guide: 14.5.17. Description of Heat Transfer (ansys.com)