Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid
We investigate the effects of helical swimmer shape (i.e. helical pitch angle and tail thickness) on swimming dynamics in a constant viscosity viscoelastic (Boger) fluid via a combination of particle tracking velocimetry, particle image velocimetry and three-dimensional simulations of the finitely e...
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Veröffentlicht in: | Journal of fluid mechanics 2022-07, Vol.942, Article A10 |
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creator | Wu, Shijian Solano, Tomas Shoele, Kourosh Mohammadigoushki, Hadi |
description | We investigate the effects of helical swimmer shape (i.e. helical pitch angle and tail thickness) on swimming dynamics in a constant viscosity viscoelastic (Boger) fluid via a combination of particle tracking velocimetry, particle image velocimetry and three-dimensional simulations of the finitely extensible nonlinear elastic model with Peterlin approximation (FENE-P). The 3D-printed helical swimmer is actuated in a magnetic field using a custom-built rotating Helmholtz coil. Our results indicate that increasing the swimmer tail thickness and pitch angle enhances the normalized swimming speed (i.e. ratio of swimming speed in the Boger fluid to that of the Newtonian fluid). Strikingly, unlike the Newtonian fluid, the viscoelastic flow around the swimmer is characterized by formation of a front–back flow asymmetry that is characterized by a strong negative wake downstream of the swimmer's body. Evidently, the strength of the negative wake is inversely proportional to the normalized swimming speed. Three-dimensional simulations of the swimmer with the FENE-P model with conditions that match those of experiments, confirm formation of a similar front–back flow asymmetry around the swimmer. Finally, by developing an approximate force balance in the streamwise direction, we show that the contribution of polymer stresses in the interior region of the helix may provide a mechanism for swimming enhancement or diminution in the viscoelastic fluid. |
doi_str_mv | 10.1017/jfm.2022.378 |
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The 3D-printed helical swimmer is actuated in a magnetic field using a custom-built rotating Helmholtz coil. Our results indicate that increasing the swimmer tail thickness and pitch angle enhances the normalized swimming speed (i.e. ratio of swimming speed in the Boger fluid to that of the Newtonian fluid). Strikingly, unlike the Newtonian fluid, the viscoelastic flow around the swimmer is characterized by formation of a front–back flow asymmetry that is characterized by a strong negative wake downstream of the swimmer's body. Evidently, the strength of the negative wake is inversely proportional to the normalized swimming speed. Three-dimensional simulations of the swimmer with the FENE-P model with conditions that match those of experiments, confirm formation of a similar front–back flow asymmetry around the swimmer. Finally, by developing an approximate force balance in the streamwise direction, we show that the contribution of polymer stresses in the interior region of the helix may provide a mechanism for swimming enhancement or diminution in the viscoelastic fluid.</description><identifier>ISSN: 0022-1120</identifier><identifier>EISSN: 1469-7645</identifier><identifier>DOI: 10.1017/jfm.2022.378</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Approximation ; Aquatic reptiles ; Asymmetry ; Coils ; Fluid flow ; JFM Papers ; Magnetic field ; Magnetic fields ; Newtonian fluids ; Particle image velocimetry ; Particle tracking ; Particle tracking velocimetry ; Pitch (inclination) ; Polymers ; Shape effects ; Swimming ; Thickness ; Three dimensional printing ; Viscoelastic fluids ; Viscoelasticity ; Viscosity</subject><ispartof>Journal of fluid mechanics, 2022-07, Vol.942, Article A10</ispartof><rights>The Author(s), 2022. Published by Cambridge University Press</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c217t-36a98bd34202960ac8e1b00271029eb6db8864b495ebb991cc927fec558b45f83</citedby><cites>FETCH-LOGICAL-c217t-36a98bd34202960ac8e1b00271029eb6db8864b495ebb991cc927fec558b45f83</cites><orcidid>0000-0002-7240-2215 ; 0000-0003-2810-0065</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0022112022003780/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,776,780,27903,27904,55606</link.rule.ids></links><search><creatorcontrib>Wu, Shijian</creatorcontrib><creatorcontrib>Solano, Tomas</creatorcontrib><creatorcontrib>Shoele, Kourosh</creatorcontrib><creatorcontrib>Mohammadigoushki, Hadi</creatorcontrib><title>Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid</title><title>Journal of fluid mechanics</title><addtitle>J. Fluid Mech</addtitle><description>We investigate the effects of helical swimmer shape (i.e. helical pitch angle and tail thickness) on swimming dynamics in a constant viscosity viscoelastic (Boger) fluid via a combination of particle tracking velocimetry, particle image velocimetry and three-dimensional simulations of the finitely extensible nonlinear elastic model with Peterlin approximation (FENE-P). The 3D-printed helical swimmer is actuated in a magnetic field using a custom-built rotating Helmholtz coil. Our results indicate that increasing the swimmer tail thickness and pitch angle enhances the normalized swimming speed (i.e. ratio of swimming speed in the Boger fluid to that of the Newtonian fluid). Strikingly, unlike the Newtonian fluid, the viscoelastic flow around the swimmer is characterized by formation of a front–back flow asymmetry that is characterized by a strong negative wake downstream of the swimmer's body. Evidently, the strength of the negative wake is inversely proportional to the normalized swimming speed. Three-dimensional simulations of the swimmer with the FENE-P model with conditions that match those of experiments, confirm formation of a similar front–back flow asymmetry around the swimmer. Finally, by developing an approximate force balance in the streamwise direction, we show that the contribution of polymer stresses in the interior region of the helix may provide a mechanism for swimming enhancement or diminution in the viscoelastic fluid.</description><subject>Approximation</subject><subject>Aquatic reptiles</subject><subject>Asymmetry</subject><subject>Coils</subject><subject>Fluid flow</subject><subject>JFM Papers</subject><subject>Magnetic field</subject><subject>Magnetic fields</subject><subject>Newtonian fluids</subject><subject>Particle image velocimetry</subject><subject>Particle tracking</subject><subject>Particle tracking velocimetry</subject><subject>Pitch (inclination)</subject><subject>Polymers</subject><subject>Shape effects</subject><subject>Swimming</subject><subject>Thickness</subject><subject>Three dimensional printing</subject><subject>Viscoelastic fluids</subject><subject>Viscoelasticity</subject><subject>Viscosity</subject><issn>0022-1120</issn><issn>1469-7645</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNptkDFPwzAQhS0EEqWw8QMssZJgO4kdj6iigFSJpcyW7VxalyQudtqKf4-rVmJhOt277-6eHkL3lOSUUPG0afucEcbyQtQXaEJLLjPBy-oSTUiSM0oZuUY3MW4IoQWRYoKWcx96PTo_YN9ijeMY_LDCA6ySuAd80F-ADazd0KTpGjpndYfjwfU9BOyGJO5dtB46HUdncdvtXHOLrlrdRbg71yn6nL8sZ2_Z4uP1ffa8yCyjYswKrmVtmqJMniUn2tZATTIqaOrB8MbUNS9NKSswRkpqrWSiBVtVtSmrti6m6OF0dxv89w7iqDZ-F4b0UjHOS1EVgh2pxxNlg48xQKu2wfU6_ChK1DE3lXJTx9xUyi3h-RnXvQmuWcHf1X8XfgGAJW8Y</recordid><startdate>20220710</startdate><enddate>20220710</enddate><creator>Wu, Shijian</creator><creator>Solano, Tomas</creator><creator>Shoele, Kourosh</creator><creator>Mohammadigoushki, Hadi</creator><general>Cambridge University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TB</scope><scope>7U5</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>S0W</scope><orcidid>https://orcid.org/0000-0002-7240-2215</orcidid><orcidid>https://orcid.org/0000-0003-2810-0065</orcidid></search><sort><creationdate>20220710</creationdate><title>Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid</title><author>Wu, Shijian ; Solano, Tomas ; Shoele, Kourosh ; Mohammadigoushki, Hadi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c217t-36a98bd34202960ac8e1b00271029eb6db8864b495ebb991cc927fec558b45f83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Approximation</topic><topic>Aquatic reptiles</topic><topic>Asymmetry</topic><topic>Coils</topic><topic>Fluid flow</topic><topic>JFM Papers</topic><topic>Magnetic field</topic><topic>Magnetic fields</topic><topic>Newtonian fluids</topic><topic>Particle image velocimetry</topic><topic>Particle tracking</topic><topic>Particle tracking velocimetry</topic><topic>Pitch (inclination)</topic><topic>Polymers</topic><topic>Shape effects</topic><topic>Swimming</topic><topic>Thickness</topic><topic>Three dimensional printing</topic><topic>Viscoelastic fluids</topic><topic>Viscoelasticity</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Shijian</creatorcontrib><creatorcontrib>Solano, Tomas</creatorcontrib><creatorcontrib>Shoele, Kourosh</creatorcontrib><creatorcontrib>Mohammadigoushki, Hadi</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>DELNET Engineering & Technology Collection</collection><jtitle>Journal of fluid mechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Shijian</au><au>Solano, Tomas</au><au>Shoele, Kourosh</au><au>Mohammadigoushki, Hadi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid</atitle><jtitle>Journal of fluid mechanics</jtitle><addtitle>J. Fluid Mech</addtitle><date>2022-07-10</date><risdate>2022</risdate><volume>942</volume><artnum>A10</artnum><issn>0022-1120</issn><eissn>1469-7645</eissn><abstract>We investigate the effects of helical swimmer shape (i.e. helical pitch angle and tail thickness) on swimming dynamics in a constant viscosity viscoelastic (Boger) fluid via a combination of particle tracking velocimetry, particle image velocimetry and three-dimensional simulations of the finitely extensible nonlinear elastic model with Peterlin approximation (FENE-P). The 3D-printed helical swimmer is actuated in a magnetic field using a custom-built rotating Helmholtz coil. Our results indicate that increasing the swimmer tail thickness and pitch angle enhances the normalized swimming speed (i.e. ratio of swimming speed in the Boger fluid to that of the Newtonian fluid). Strikingly, unlike the Newtonian fluid, the viscoelastic flow around the swimmer is characterized by formation of a front–back flow asymmetry that is characterized by a strong negative wake downstream of the swimmer's body. Evidently, the strength of the negative wake is inversely proportional to the normalized swimming speed. Three-dimensional simulations of the swimmer with the FENE-P model with conditions that match those of experiments, confirm formation of a similar front–back flow asymmetry around the swimmer. Finally, by developing an approximate force balance in the streamwise direction, we show that the contribution of polymer stresses in the interior region of the helix may provide a mechanism for swimming enhancement or diminution in the viscoelastic fluid.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/jfm.2022.378</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0002-7240-2215</orcidid><orcidid>https://orcid.org/0000-0003-2810-0065</orcidid></addata></record> |
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subjects | Approximation Aquatic reptiles Asymmetry Coils Fluid flow JFM Papers Magnetic field Magnetic fields Newtonian fluids Particle image velocimetry Particle tracking Particle tracking velocimetry Pitch (inclination) Polymers Shape effects Swimming Thickness Three dimensional printing Viscoelastic fluids Viscoelasticity Viscosity |
title | Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid |
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