[arunraj]

Hello all,

I would like to know the application of Lee model in heat pipes.

As I am new to this field, I started with a simple problem. Two dimensional geometry of heat pipe with wick and wall. There are two phases, liquid and vapor. The liquid is in the wick and vapor is in the core region. The heat pipe is made of copper. I have attached the domain details. I have used the following work as the reference to simulate the problem.

Poplaski, L.M., Benn, S.P. and Faghri, A., 2017. Thermal performance of heat pipes using nanofluids. International Journal of Heat and Mass Transfer, 107, pp.358-371.

https://scholarcommons.sc.edu/etd/4026/


It is clear case of phase change heat transfer.

The boundary conditions are heat flux at evaporator and condenser and adiabatic at center region. In addition, we need to specify interfacial velocities and temperature at the wick-vapor interface. However, the above thesis has implemented several UDFs and UDS citing that the interfacial temperature is not taken properly by ANSYS Fluent V16. I would like to know

1. If Lee model with VOF can solve this problem without any UDFs in ANSYS Fluent v20.2?
2. How to treat the interfacial velocities and temperature at the condenser-wick and evaporator-wick. Whats the best way?
3. Does any sort of UDF or UDS is required for this problem?

Thank you for your effort and time. Looking forward for a reply.