3.2.29 evangelides - Evangelides-Papaevangelou-Tzimopoulos friction factor

f = evangelides(d,e,re)

Calculate the Evangelides-Papaevangelou-Tzimopoulos approximation of the Colebrook-White equation.

Arguments

d

Pipe internal diameter ().

e

Pipe effective roughness .

re

Reynolds number

Returns Darcy friction factor , dimensionless.