3.2.36 cw_koo - Koo friction factor

f = cw_koo(re)

Calculate the Koo approximation of the Colebrook-White equation.

Arguments

re

Reynolds number

Returns Darcy friction factor , dimensionless.

Possible Errors

Koo friction factor only valid for 1e4 < Re < 1e7

The given Reynolds number is out of range.

Koo diameter is <= 0

The given internal diameter of the pipe must be above zero.