3.2.6 cw_goudar_sonnad2 - Goudar-Sonnad (2011) friction factor

f = cw_goudar_sonnad2(d,e,re)

Calculate the Goudar-Sonnad approximation of the Colebrook-White equation.

Arguments

d

Pipe internal diameter ().

e

Pipe effective roughness .

re

Reynolds number

Returns Darcy friction factor , dimensionless.

Possible Errors

Goudar-Sonnad-2 diameter is <= 0

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