Rheological behavior of fiber-filled model suspensions: Effect of fiber flexibility
The rheological behavior of model suspensions consisting of a Newtonian silicone oil and fibers of different flexibilities have been investigated in steady and transient shear flows. Various fiber suspensions have been prepared to examine the effect of flexibility parameters (stiffness and aspect ra...
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Veröffentlicht in: | Journal of rheology (New York : 1978) 2009-05, Vol.53 (3), p.631-650 |
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description | The rheological behavior of model suspensions consisting of a Newtonian silicone oil and fibers of different flexibilities have been investigated in steady and transient shear flows. Various fiber suspensions have been prepared to examine the effect of flexibility parameters (stiffness and aspect ratio) as well as the role of interactions in the semi-dilute and semi-concentrated regimes. The viscous and elastic properties of the fiber suspensions are shown to be strongly enhanced by fiber flexibility. With increasing flexibility, the suspensions also exhibit enhanced shear-thinning and the shear rate for the onset of shear-thinning decreases. In start-up flow and especially at low shear rate, the suspensions show large stress overshoots, and under reversal flow delayed overshoots. The magnitude of the overshoot increases as fiber flexibility gets larger. This last effect has been attributed to less orientation in the flow direction during the forward flow for the more flexible fibers. Finally, the effects are more pronounced in the semi-concentrated regime, and this is attributed to enhanced fiber-fiber interactions. |
doi_str_mv | 10.1122/1.3103546 |
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This last effect has been attributed to less orientation in the flow direction during the forward flow for the more flexible fibers. Finally, the effects are more pronounced in the semi-concentrated regime, and this is attributed to enhanced fiber-fiber interactions.</description><identifier>ISSN: 0148-6055</identifier><identifier>EISSN: 1520-8516</identifier><identifier>DOI: 10.1122/1.3103546</identifier><identifier>CODEN: JORHD2</identifier><language>eng</language><publisher>Melville, NY: The Society of Rheology</publisher><subject>Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Fiber ; Flexibility ; Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc ; Material form ; Model systems ; Physics ; Rheology ; Shear ; Suspensions ; Transient flow</subject><ispartof>Journal of rheology (New York : 1978), 2009-05, Vol.53 (3), p.631-650</ispartof><rights>The Society of Rheology</rights><rights>2009 The Society of Rheology</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c421t-55cabc3bb86d119c4fd3acc90a6c4f6f294178cd1cf718fda99781b17ed8c4cd3</citedby><cites>FETCH-LOGICAL-c421t-55cabc3bb86d119c4fd3acc90a6c4f6f294178cd1cf718fda99781b17ed8c4cd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,794,4512,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21453363$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Keshtkar, M.</creatorcontrib><creatorcontrib>Heuzey, M. 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In start-up flow and especially at low shear rate, the suspensions show large stress overshoots, and under reversal flow delayed overshoots. The magnitude of the overshoot increases as fiber flexibility gets larger. This last effect has been attributed to less orientation in the flow direction during the forward flow for the more flexible fibers. Finally, the effects are more pronounced in the semi-concentrated regime, and this is attributed to enhanced fiber-fiber interactions.</description><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>Fiber</subject><subject>Flexibility</subject><subject>Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc</subject><subject>Material form</subject><subject>Model systems</subject><subject>Physics</subject><subject>Rheology</subject><subject>Shear</subject><subject>Suspensions</subject><subject>Transient flow</subject><issn>0148-6055</issn><issn>1520-8516</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLAzEUhYMoWKsL_8FsXChMzZ08JuNCkFIfUBB8rIdMHjaSNkMyFvvvHWmtgujq3sV3DpwPoWPAI4CiOIcRAUwY5TtoAKzAuWDAd9EAAxU5x4zto4OUXjEGEJQP0OPDzAQfXpySPmvMTC5diFmwmXWNibl13hudzYM2PktvqTWL5MIiXWQTa43qtmRmvXl3jfOuWx2iPSt9MkebO0TP15On8W0-vb-5G19Nc0UL6HLGlGwUaRrBNUClqNVEKlVhyfuf26KiUAqlQdkShNWyqkoBDZRGC0WVJkN0uu5VMaQUja3b6OYyrmrA9aeNGuqNjZ49WbOtTP1UG-VCubQNFEAZIZz03OWaS8p1suu3_l36Q139pa4vOPurYBnid7hutf0P_j3hA9fykb0</recordid><startdate>20090501</startdate><enddate>20090501</enddate><creator>Keshtkar, M.</creator><creator>Heuzey, M. 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J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c421t-55cabc3bb86d119c4fd3acc90a6c4f6f294178cd1cf718fda99781b17ed8c4cd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Exact sciences and technology</topic><topic>Fiber</topic><topic>Flexibility</topic><topic>Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc</topic><topic>Material form</topic><topic>Model systems</topic><topic>Physics</topic><topic>Rheology</topic><topic>Shear</topic><topic>Suspensions</topic><topic>Transient flow</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Keshtkar, M.</creatorcontrib><creatorcontrib>Heuzey, M. C.</creatorcontrib><creatorcontrib>Carreau, P. J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of rheology (New York : 1978)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Keshtkar, M.</au><au>Heuzey, M. C.</au><au>Carreau, P. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rheological behavior of fiber-filled model suspensions: Effect of fiber flexibility</atitle><jtitle>Journal of rheology (New York : 1978)</jtitle><date>2009-05-01</date><risdate>2009</risdate><volume>53</volume><issue>3</issue><spage>631</spage><epage>650</epage><pages>631-650</pages><issn>0148-6055</issn><eissn>1520-8516</eissn><coden>JORHD2</coden><abstract>The rheological behavior of model suspensions consisting of a Newtonian silicone oil and fibers of different flexibilities have been investigated in steady and transient shear flows. Various fiber suspensions have been prepared to examine the effect of flexibility parameters (stiffness and aspect ratio) as well as the role of interactions in the semi-dilute and semi-concentrated regimes. The viscous and elastic properties of the fiber suspensions are shown to be strongly enhanced by fiber flexibility. With increasing flexibility, the suspensions also exhibit enhanced shear-thinning and the shear rate for the onset of shear-thinning decreases. In start-up flow and especially at low shear rate, the suspensions show large stress overshoots, and under reversal flow delayed overshoots. The magnitude of the overshoot increases as fiber flexibility gets larger. This last effect has been attributed to less orientation in the flow direction during the forward flow for the more flexible fibers. Finally, the effects are more pronounced in the semi-concentrated regime, and this is attributed to enhanced fiber-fiber interactions.</abstract><cop>Melville, NY</cop><pub>The Society of Rheology</pub><doi>10.1122/1.3103546</doi><tpages>20</tpages></addata></record> |
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subjects | Cross-disciplinary physics: materials science rheology Exact sciences and technology Fiber Flexibility Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc Material form Model systems Physics Rheology Shear Suspensions Transient flow |
title | Rheological behavior of fiber-filled model suspensions: Effect of fiber flexibility |
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