Momentum Transfer in Curved Pipes. 1. Newtonian Fluids

Abstract

Pressure drop data in the laminar and turbulent region for Newtonian fluids flowing through 60 helical coils are presented. Coils of wide range of diameter and pitch are investigated to fulfil the snags existing in the previous investigations and to resolve the effect of coil pitch. The following correlations are obtained for Dt/Dc range 0.003 to 0.15 and p/Dc range 0 to 25.4. (1) For laminar flow: fcJfSL - 1 = 0.033(log ND)40, where 1 < NDm <3000. (2) For critical Reynolds number: NRe = 2 X 104(Dt/2Rc)032. (3) For turbulent flow: fc - fST = 0.0075(Dt/2Rc)1/2, where 4500 < NRe < 105. © 1979, American Chemical Society. All rights reserved.