3.2.37 cw_nikuradse_reichert - Nikuradse-Reichert friction factor

f = cw_nikuradse_reichert(d,e,re)

Calculate the Nikuradse-Reichert 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

Nikuradse-Reichert friction factor only valid for Re > 1e4

The given Reynolds number is out of range.

Nikuradse-Reichert friction factor only valid for e/D > 0.01

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

Nikuradse-Reichert diameter is <= 0

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