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Dependence of effective slip on wall roughness in dilute polymer solutions

Saffman, P. G. (1977) Dependence of effective slip on wall roughness in dilute polymer solutions. Physics of Fluids, 20 (10, Pa). S272-S275. ISSN 0031-9171. http://resolver.caltech.edu/CaltechAUTHORS:SAFpof77

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Abstract

A hypothesis is made for the modification of a complete turbulence model to take account of a dilute polymer concentration. The equations are integrated in the wall layer and give the effective slip u*DeltaB as functions of wall roughness and empirical polymer properties, where u* is the friction velocity and DeltaB is the change of the constant in the logarithmic law of the wall. Results in qualitative agreement with experiment are found.


Item Type:Article
Additional Information:Copyright © 1977 American Institute of Physics. I wish to thank Dr. Fausto Milinazzo for invaluable help with the numerical solution of the differential equations. This work was supported by the Energy Research and Development Administration (AT 04-3-767).
Subject Keywords:SLIP VELOCITY, TURBULENT FLOW, ADDITIVES, BOUNDARY LAYERS, DRAG Q1, POLYMERS, ROUGHNESS, WALLS
Record Number:CaltechAUTHORS:SAFpof77
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SAFpof77
Alternative URL:http://dx.doi.org/10.1063/1.861740
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10143
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:15 Apr 2008
Last Modified:26 Dec 2012 09:57

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