ChE304 Moody Friction Factor Chart ü Moody Friction Factor Chart Laminar Flow — f = 64 ê Re Re = r dv m = dv n where Ó = m r d — diameter; v — velocity; r — density; m — dynamic viscosity; n — kinematic viscosity ü Turbulent flow get f from the chart or the Haaland equation. ü Haaland Equation — Note: the Log is the natural log (ln) f = 1.63639 LogA0.234043 eod 1.11 + 6.9 Re E 2 ü TI - 89 Implementation where e is e/d and fre(v) is a Reynolds number function Define fhf HvL = 1.63639 ê ln H0.234043 * e^1.11 + 6.9 ê fre HvLL ^2