3.2.23 manadilli - Manadilli friction factor

f = manadilli(d,e,re)

Calculate the Manadilli approximation of the Colebrook-White equation for range and .

Arguments

d

Pipe internal diameter ().

e

Pipe effective roughness .

re

Reynolds number

Returns Darcy friction factor , dimensionless.

Possible Errors

Manadilli approximation is only valid for 4000 <= Re <= 1e8

The given Reynolds number is out of range.

Manadilli approximation is only valid for 0 <= e/D <= 0.05

The given pipe roughness/diameter fraction is out of range.