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 |
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| 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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