3.2.20 cw_zigrang_sylvester1 - Zigrang-Sylvester friction factor

f = cw_zigrang_sylvester1(d,e,re)

Calculate the Zigrang-Sylvester, single recursion 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

Zigrang-Sylvester-1 diameter is <= 0

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