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Pipeline scale‐up in drag reducing turbulent flow
Author(s) -
Sood Arun,
Rhodes Edward
Publication year - 1998
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450760103
Subject(s) - drag , turbulence , pressure drop , mechanics , prandtl number , materials science , parasitic drag , pipe flow , scale (ratio) , drag coefficient , flow (mathematics) , physics , convection , quantum mechanics
Models available in literature for predicting drag reduction scale‐up are inadequate as they have been successful only over a narrow range of diameters. A new scale‐up model is presented which equates dampening of turbulent velocity fluctuations by drag reducing additives to a reduction in the Prandtl mixing length. Flow and pressure drop data from a laboratory scale pipe along with shear viscosity measurements are sufficient to predict drag reduction scale‐up in bigger diameter pipes. Using this approach, scale‐up was successfully predicted over a diameter range of 7 to 154 mm for a surfactant‐water system and 26.6 to 1194 mm for a polymer‐oil system.