Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number

Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number

Approved for public release, distribution is unlimited. === The drag reducing effect of poly (ethylene oxide) additives on blunt bodies in water was investigated by examining the behvaior of a sphere in both subcritical and supercritical Reynolds number regions. Drop tests were conducted in water a...

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Main Author: Chenard, John Henry
Other Authors: Sanders, James N.
Language:en_US
Published: Monterey, California. U.S. Naval Postgraduate School 2012
Online Access:http://hdl.handle.net/10945/12029
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spelling ndltd-nps.edu-oai-calhoun.nps.edu-10945-120292015-05-06T03:58:26Z Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number Chenard, John Henry Sanders, James N. Naval Postgraduate School Department of Physics Approved for public release, distribution is unlimited. The drag reducing effect of poly (ethylene oxide) additives on blunt bodies in water was investigated by examining the behvaior of a sphere in both subcritical and supercritical Reynolds number regions. Drop tests were conducted in water and in concentrations of poly(ethylene oxide) WSR 301 ranging in concentration from 50 wppm to 1000 wppm. Reduction in drag was noted for all concentrations in the Reynolds number range of 4 x 104 to s.5 x 105. A critical Reynolds number of 4.5 x 105 was observed for dilute solutions (50 and 100 wppm), while more concentrated solutions exhibited a uniformly decreasing drag. These results are explained by examining the interaction of profile and friction drag, together with the effects of polymer additives upon wake diameter size. 2012-08-29T23:30:43Z 2012-08-29T23:30:43Z 1967-12 Thesis http://hdl.handle.net/10945/12029 en_US This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Monterey, California. U.S. Naval Postgraduate School
collection NDLTD
language en_US
sources NDLTD
description Approved for public release, distribution is unlimited. === The drag reducing effect of poly (ethylene oxide) additives on blunt bodies in water was investigated by examining the behvaior of a sphere in both subcritical and supercritical Reynolds number regions. Drop tests were conducted in water and in concentrations of poly(ethylene oxide) WSR 301 ranging in concentration from 50 wppm to 1000 wppm. Reduction in drag was noted for all concentrations in the Reynolds number range of 4 x 104 to s.5 x 105. A critical Reynolds number of 4.5 x 105 was observed for dilute solutions (50 and 100 wppm), while more concentrated solutions exhibited a uniformly decreasing drag. These results are explained by examining the interaction of profile and friction drag, together with the effects of polymer additives upon wake diameter size.
author2 Sanders, James N.
author_facet Sanders, James N.
Chenard, John Henry
author Chenard, John Henry
spellingShingle Chenard, John Henry
Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
author_sort Chenard, John Henry
title Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
title_short Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
title_full Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
title_fullStr Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
title_full_unstemmed Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number
title_sort drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical reynolds number
publisher Monterey, California. U.S. Naval Postgraduate School
publishDate 2012
url http://hdl.handle.net/10945/12029
work_keys_str_mv AT chenardjohnhenry dragofspheresindiluteaqueoussolutionsofpolyethyleneoxidewithintheregionofthecriticalreynoldsnumber
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