Many (inc Cathar,I think) short cut P/Q/Velocity/Reynolds calculations by using
Pressure Drop 5.0.It also contains useful information on fluid properties vs Temperature (Viscosity.Density)
Find have to take as many short cuts as possible on the road from flow to die temperature.
My preferred route for Jets is :-
Flowrate --PD Drop---> velocity --Flomerics--> h(conv) --Kryotherm--> h(eff)--Waterloo--> "Die Temp"(isothermal coolant).
Unfortunately Kryotherm only does channels, so for "Cups" you have to look elsewhere(dunno where) for conversion of h(convection) to h(effective).