[mtfl]

Hello everyone,
I'm newbie in ANSYS Fluent (CFD simulation).
I want to make a simulation of Pool Boiling using PCB as a heater.
Here is my geometry. I set up the heater's material as copper and the rest as aluminium.

I ran the simulation with the Heater Temperature 403K, while the backflow total temperature is Saturation Temperature (373K). I applied the UDF from the ANSYS tutorial (horizontal film boiling) and changed the latent heat as Water Latent heat.

And also I set the Custom Field Functions :
403 - (y-0.05) * 30/0.25

Where Y = 0.05 m, the temperature 403K
Y = 0.25 m, the temperature is 373 (403-373=30K)

I think I need to set another Custom Field Function for the X coordinate, while the heater started at (x,y)= (0.07, 0.05) to (0.23, 0.05), but I have no idea how to set this one.

The result that I have is, there are bubbles but not even one from the heater, where I think should be from the heater.

If you don't mind, please share your experiences and knowledge about this problem. Thank you very much, May GOD reward you more.