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Evaporation in a closed volume
Posted 10 avr. 2017, 12:03 UTC−4 Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD) Version 5.2 0 Replies
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I'm trying to set up a model for the evaporation of butane in a tube (basically, a sort of heat pipe).
To do so, as in standard heat pipes, I have prepared a geometry with three sections: evaporator, adiabatic and condenser. In the evaporator section, I have defined the properties for the liquid butane, in the adiabatic and condensing sections the material is gaseous butane.
I am using HT and Laminar flow interfaces: I use a heat flux BC to heat up the evaporator and I get a convective heat flux in the condensing section. Moreover, I am using boundary heat source BCs to take into account the heat of evaporation/condensation.
My problem, however is on the NS equations:
at the moment, I have defined an inlet and outlet condition, corresponding to saturation pressure at the temperature of the evaporator and condenser. How can I define the mass balance at the interface, to say that the amount of refrigerant evaporated in the evaporator flows through the adiabatic section and enters the condensing section?
Thank you in advance,
Valeria
Hello Valeria Palomba
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