What geometry? Inside tubes, outside tubes, single-pass, multi-pass, tube bank, plate, shell, waffle? TEMA? Heat Exchange Institute? Heat Exchanger Design Handbook? Lots of references available free online.

Dudley J Benton It is for finned and tube heat exchanger geometry inside the tube. I want to know the latest correlation that are been adopted widely

Is the condensation on the outside or inside of the tubes? If it is on the outside, there are many time-proven documents on the subject, including: The Heat Exchange Institute Standards for Steam Surface Condensers and ASME PTC-12.2, and TEMA, all of which are available free online. For condensation inside tubes there are different formulas, but you will need to also identify the flow regime and orientation (horizontal, vertical, bends, etc.).

Dudley J Benton Thank you for the information, I guess when we consider heat exchanger, they mostly we take horizontal orientation of tubes so the flow would be horizontally move either one or two-phase

If there is two-phase flow inside the tubes and these end in a U-bend instead of a tube sheet, then the heat transfer and pressure drop in those regions plus the entrance and exit portions becomes quite complicated. Upward and downward flow regions will be different as well. In these regions you can take advantage of Reynolds Analogy, St=f/2, which couples the heat transfer and pressure drop. One such heat exchanger which I have studied at length and for which I have developed a complex two-phase model is the MSR (Moisture Separator Reheater used on the steam side of all pressurized water reactors, google it for pictures). A summary of the details may be found in this spreadsheet.