I have done my simulation for the case of subcooled boiling until 40k iterations with the URF is 1 for energy. I have coarse mesh for around 350k elements and also I made another model that insert outer diameter of the domain which increases the mesh into 630k elements.
The reason why I stopped the simulation until 40k iterations is because the mass imbalance for both case I have reached below 1% and try to get the data from the wall temperature for calculating the quality of the case.
Nevertheless, the wall temperature showed something strange value, because when the wall temperature is higher than saturation temperature it means subcooled boiling occurred according to the ANSYS FLUENT help which means the bulk temperature is still below than saturation temperature.
However, the bulk temperature is higher than the saturation temperature which gives me a problem to calculate the quality of the volume fraction itself. Do you have any recommendation what should I do to obtain a reasonable value for the wall temperature and bulk temperature? My assumptions are on the mesh refinement or I need to continue my running until certain iterations while changing some URF.
Thank you in advance,
Luthfi Ady Farizan Haryoko