Another good source for Kettle Reboiler design is "Process Heat Transfer" by Serth. He discusses such factors as LMTD, Fouling, Number of nozzles and shell diameter.
Equivalent formulas in a reference text can be found in Heat Transfer in Process Engineering by Eduardo Cao. It has simplified equations for different objects,
If the operating pressure is low enough in order to treat the mixture like an ideal gas, it is simple. The K-values are vapor pressure/ operating pressure. Otherwise the Wilson equation could be used. It depends on the critical pressure, critical temperature and acentric factor.
After John Slagle past away, his wife named Pat ran the company. Back in 1970 -1990, I had a computer service named "Gulley Computer Associates" that had thermal design software that Slagle used. I checked our storage but did not find anything helpful.
The stagnant area is the area from the forward front of the impingement plate and the tubesheet.
I called it an area but it is actually more of a volume.
The perforations slow the velocities coming off the plate. It is not desirable to slow this velocity going toward the tubesheet. Slowing this velocity can create a stagnant area where there can be corrosion and fouling.
Report
I am puzzled by using the term "void fraction" when mixing liquids. Void fraction is for two phase streams and is the fraction that is gas.
There are different types of static mixtures. The least expensive type is the twisted ribbon. It is for Reynolds number below 2500.
