I am solving a 2D axisymmetric vertical channel pipe case where i need to predict the CHF I am using Crtical heat flux model under Boiling model in Ansys Fluent my doubt is when we solve subcooled flow boiling case using RPI wall boiling case we will be fixing the cell zone conditions for vapor as its saturation temperature but if we want to capture the CHF using Critical heat flux model do we still need to fix the vapour temperature in cell zone conditions to its saturation temperature or not pls someone clarify .....it would be of great help to me...thanks