Explicit equation for Darcy-Weisbach pipe friction factor, Victor Miguel Ponce, Thais H. Abissamra, Isabel Consoli, San Diego State University

   online_explicit_darcy_weisbach: Explicit equation for Darcy-Weisbach friction factor f

Comparison of laminar and turbulent flow


                  0.25
f = ^{________________________________________}
     {log[(k_s/D)/3.7 + 5.74/Re^0.9]}²

Explicit equation for discharge
Explicit equation for diameter

INPUT DATA:

Relative roughness k_s /D :

    [Restricted to: 0.00001 < k_s /D < 0.02]

Reynolds number Re :

    [Restricted to: 4000 < Re < 100,000,000]

OUTPUT:

f = 0



Your request was processed at 08:35:00 pm on February 2nd, 2026   [ 260202  20:35:00 ].
Thank you for running online_explicit_darcy_weisbach.   [160607]