Civil Engineers with Experience Using the Colebrook Equation?

[C.Ret]

(02-07-2021 02:29 PM)Csaba Tizedes Wrote:  My "ABC-method" from my university years (yes, I was VERY proud for my 12 steps fixed point iterative method ) - check the attached picture.

Efficient ABC-method ! Thanks for the numerical example you provide.
My own full personal HP-28'Solver-method is 100% in agreement with your numeric result.

I must admit that entering the formulae in the HP-28S solver equation need more than 12 keystrokes. But this is the cost to pay for a more readable display and a full equation solver environment.
Estimating f is no more complicated than entering all the parameter by pressing corresponding labels and then a final pression on [shift]( f ) soft menu key to get the numeric result in a flash !

C.Ret
(Biochemist)