Measurements of the viscosities of suspensions of oriented rods using falling ball rheometry
Using falling ball rheometry, we measured the viscosities of suspensions of oriented rods ( average aspect ratio = 19.83 ). The rods were neutrally buoyant in the suspending fluid and were sufficiently large so that Brownian and colloidal forces were negligible. The rods were oriented hydrodynamical...
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| Veröffentlicht in: | International journal of multiphase flow 1990, Vol.16 (4), p.651-662 |
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| container_title | International journal of multiphase flow |
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| creator | Mondy, L.A. Morrison, T.G. Graham, A.L. Powell, R.L. |
| description | Using falling ball rheometry, we measured the viscosities of suspensions of oriented rods (
average aspect ratio = 19.83
). The rods were neutrally buoyant in the suspending fluid and were sufficiently large so that Brownian and colloidal forces were negligible. The rods were oriented hydrodynamically by passing a fixture through the suspension which produced a local flow-that tended to align the particles along the axis of the glass column containing the suspension. Balls were dropped along the axis of the cylinder and the average terminal velocity was measured using an eddy current detector. We find that the apparent viscosity for a suspension of rods that are approximately aligned is less than that for a suspension having the same volume fraction of rods that are randomly oriented. For example, at a volume fraction of 0.05, the relative viscosity of an oriented suspension is 1.52, whereas a randomly oriented suspension has a relative viscosity of 2.37. In addition, we find that the viscosity measured for the aligned rods closely correlates with the viscosities of suspensions of short fibers (having similar aspect ratios and concentrations) measured in shearing flows. |
| doi_str_mv | 10.1016/0301-9322(90)90022-B |
| format | Article |
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average aspect ratio = 19.83
). The rods were neutrally buoyant in the suspending fluid and were sufficiently large so that Brownian and colloidal forces were negligible. The rods were oriented hydrodynamically by passing a fixture through the suspension which produced a local flow-that tended to align the particles along the axis of the glass column containing the suspension. Balls were dropped along the axis of the cylinder and the average terminal velocity was measured using an eddy current detector. We find that the apparent viscosity for a suspension of rods that are approximately aligned is less than that for a suspension having the same volume fraction of rods that are randomly oriented. For example, at a volume fraction of 0.05, the relative viscosity of an oriented suspension is 1.52, whereas a randomly oriented suspension has a relative viscosity of 2.37. In addition, we find that the viscosity measured for the aligned rods closely correlates with the viscosities of suspensions of short fibers (having similar aspect ratios and concentrations) measured in shearing flows.</description><identifier>ISSN: 0301-9322</identifier><identifier>EISSN: 1879-3533</identifier><identifier>DOI: 10.1016/0301-9322(90)90022-B</identifier><identifier>CODEN: IJMFBP</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Exact sciences and technology ; falling ball viscometry ; fiber orientation ; Fluid dynamics ; Fundamental areas of phenomenology (including applications) ; Instrumentation for fluid dynamics ; Physics ; short fiber suspensions ; viscosity measurement</subject><ispartof>International journal of multiphase flow, 1990, Vol.16 (4), p.651-662</ispartof><rights>1990</rights><rights>1991 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c402t-e6b5a05d7001e2e5ed0edb0a16970a11f0e9a0d0015f3328a32366195ab873a13</citedby><cites>FETCH-LOGICAL-c402t-e6b5a05d7001e2e5ed0edb0a16970a11f0e9a0d0015f3328a32366195ab873a13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/0301-9322(90)90022-B$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,4024,27923,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=19599983$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Mondy, L.A.</creatorcontrib><creatorcontrib>Morrison, T.G.</creatorcontrib><creatorcontrib>Graham, A.L.</creatorcontrib><creatorcontrib>Powell, R.L.</creatorcontrib><title>Measurements of the viscosities of suspensions of oriented rods using falling ball rheometry</title><title>International journal of multiphase flow</title><description>Using falling ball rheometry, we measured the viscosities of suspensions of oriented rods (
average aspect ratio = 19.83
). The rods were neutrally buoyant in the suspending fluid and were sufficiently large so that Brownian and colloidal forces were negligible. The rods were oriented hydrodynamically by passing a fixture through the suspension which produced a local flow-that tended to align the particles along the axis of the glass column containing the suspension. Balls were dropped along the axis of the cylinder and the average terminal velocity was measured using an eddy current detector. We find that the apparent viscosity for a suspension of rods that are approximately aligned is less than that for a suspension having the same volume fraction of rods that are randomly oriented. For example, at a volume fraction of 0.05, the relative viscosity of an oriented suspension is 1.52, whereas a randomly oriented suspension has a relative viscosity of 2.37. In addition, we find that the viscosity measured for the aligned rods closely correlates with the viscosities of suspensions of short fibers (having similar aspect ratios and concentrations) measured in shearing flows.</description><subject>Exact sciences and technology</subject><subject>falling ball viscometry</subject><subject>fiber orientation</subject><subject>Fluid dynamics</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Instrumentation for fluid dynamics</subject><subject>Physics</subject><subject>short fiber suspensions</subject><subject>viscosity measurement</subject><issn>0301-9322</issn><issn>1879-3533</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhi0EEqXwDxiyIGAInOM4qRckWvElFbHAhmS5yYUaJXHxJZX673FaBBuLX9n3nE_3MHbK4YoDz65BAI-VSJILBZcKIEni6R4b8UmuYiGF2GejX-SQHRF9AoDMUzFi789oqPfYYNtR5KqoW2K0tlQ4sp3F7RP1tMKWrGu3V-dtgLGMvCsp6sm2H1Fl6nrIRcjIL9E12PnNMTsIBcKTnxyzt_u719ljPH95eJrdzuMihaSLMVtIA7LMATgmKLEELBdgeKbycPIKUBkoQ1VWQiQTIxKRZVxJs5jkwnAxZue7f1feffVInW7CBljXpkXXk87TNJPAUxXIdEcW3hF5rPTK28b4jeagB5d6EKUHUVqB3rrU09B29jPAUGHqypu2sPTXq6RSaiICd7PjMGy7tug1FUFWgaX1WHS6dPb_Qd9WXIil</recordid><startdate>1990</startdate><enddate>1990</enddate><creator>Mondy, L.A.</creator><creator>Morrison, T.G.</creator><creator>Graham, A.L.</creator><creator>Powell, R.L.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TC</scope></search><sort><creationdate>1990</creationdate><title>Measurements of the viscosities of suspensions of oriented rods using falling ball rheometry</title><author>Mondy, L.A. ; Morrison, T.G. ; Graham, A.L. ; Powell, R.L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c402t-e6b5a05d7001e2e5ed0edb0a16970a11f0e9a0d0015f3328a32366195ab873a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>Exact sciences and technology</topic><topic>falling ball viscometry</topic><topic>fiber orientation</topic><topic>Fluid dynamics</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>Instrumentation for fluid dynamics</topic><topic>Physics</topic><topic>short fiber suspensions</topic><topic>viscosity measurement</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mondy, L.A.</creatorcontrib><creatorcontrib>Morrison, T.G.</creatorcontrib><creatorcontrib>Graham, A.L.</creatorcontrib><creatorcontrib>Powell, R.L.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical Engineering Abstracts</collection><jtitle>International journal of multiphase flow</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mondy, L.A.</au><au>Morrison, T.G.</au><au>Graham, A.L.</au><au>Powell, R.L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measurements of the viscosities of suspensions of oriented rods using falling ball rheometry</atitle><jtitle>International journal of multiphase flow</jtitle><date>1990</date><risdate>1990</risdate><volume>16</volume><issue>4</issue><spage>651</spage><epage>662</epage><pages>651-662</pages><issn>0301-9322</issn><eissn>1879-3533</eissn><coden>IJMFBP</coden><abstract>Using falling ball rheometry, we measured the viscosities of suspensions of oriented rods (
average aspect ratio = 19.83
). The rods were neutrally buoyant in the suspending fluid and were sufficiently large so that Brownian and colloidal forces were negligible. The rods were oriented hydrodynamically by passing a fixture through the suspension which produced a local flow-that tended to align the particles along the axis of the glass column containing the suspension. Balls were dropped along the axis of the cylinder and the average terminal velocity was measured using an eddy current detector. We find that the apparent viscosity for a suspension of rods that are approximately aligned is less than that for a suspension having the same volume fraction of rods that are randomly oriented. For example, at a volume fraction of 0.05, the relative viscosity of an oriented suspension is 1.52, whereas a randomly oriented suspension has a relative viscosity of 2.37. In addition, we find that the viscosity measured for the aligned rods closely correlates with the viscosities of suspensions of short fibers (having similar aspect ratios and concentrations) measured in shearing flows.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/0301-9322(90)90022-B</doi><tpages>12</tpages></addata></record> |
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| ispartof | International journal of multiphase flow, 1990, Vol.16 (4), p.651-662 |
| issn | 0301-9322 1879-3533 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Exact sciences and technology falling ball viscometry fiber orientation Fluid dynamics Fundamental areas of phenomenology (including applications) Instrumentation for fluid dynamics Physics short fiber suspensions viscosity measurement |
| title | Measurements of the viscosities of suspensions of oriented rods using falling ball rheometry |
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