Inertial migration of circular particles in Poiseuille flow of a power-law fluid
The immersed boundary-lattice Boltzmann method is used to study the inertial migration of particles in Poiseuille flow of a power-law fluid. The effects of Reynolds number, power-law index, and blockage ratio on the formation of particle trains are explored. The results show that single particle wit...
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Veröffentlicht in: | Physics of fluids (1994) 2019-07, Vol.31 (7) |
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description | The immersed boundary-lattice Boltzmann method is used to study the inertial migration of particles in Poiseuille flow of a power-law fluid. The effects of Reynolds number, power-law index, and blockage ratio on the formation of particle trains are explored. The results show that single particle with different initial positions reach the same equilibrium position for the same power-law index. The stable equilibrium position moves closer to the centerline under the higher power-law index and blockage ratio. One-line of eight particles distributed initially at a vertical position will migrate laterally to the vicinity of the wall and form single-line particle trains. The particle spacing is unstable and increases when particles migrate to the equilibrium position. The inertial focusing length is an important factor for analyzing the formation of particle trains, which will be longer with increasing the power-law index. The mean particle spacing will be reduced with increasing Re and blockage ratio. Two-lines of 12 particles distributed initially and abreast along both sides of the centerline will migrate to the vicinity of the wall and form staggered particle trains. Due to the multiparticles interaction, the final particle equilibrium position will deviate from the single particle equilibrium position. The axial spacing between two neighboring particles is stable or fluctuates within a certain range. The particle spacing decreases with increasing the power-law index and blockage ratio, and with decreasing Re. The shear-thinning fluid is beneficial to the formation of single-line particle trains and staggered particle trains. |
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The effects of Reynolds number, power-law index, and blockage ratio on the formation of particle trains are explored. The results show that single particle with different initial positions reach the same equilibrium position for the same power-law index. The stable equilibrium position moves closer to the centerline under the higher power-law index and blockage ratio. One-line of eight particles distributed initially at a vertical position will migrate laterally to the vicinity of the wall and form single-line particle trains. The particle spacing is unstable and increases when particles migrate to the equilibrium position. The inertial focusing length is an important factor for analyzing the formation of particle trains, which will be longer with increasing the power-law index. The mean particle spacing will be reduced with increasing Re and blockage ratio. Two-lines of 12 particles distributed initially and abreast along both sides of the centerline will migrate to the vicinity of the wall and form staggered particle trains. Due to the multiparticles interaction, the final particle equilibrium position will deviate from the single particle equilibrium position. The axial spacing between two neighboring particles is stable or fluctuates within a certain range. The particle spacing decreases with increasing the power-law index and blockage ratio, and with decreasing Re. The shear-thinning fluid is beneficial to the formation of single-line particle trains and staggered particle trains.</description><identifier>ISSN: 1070-6631</identifier><identifier>EISSN: 1089-7666</identifier><identifier>DOI: 10.1063/1.5108797</identifier><identifier>CODEN: PHFLE6</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Computational fluid dynamics ; Equilibrium ; Fluid dynamics ; Fluid flow ; Inertial coordinates ; Laminar flow ; Migration ; Physics ; Power law ; Reynolds number ; Shear thinning (liquids) ; Vertical orientation</subject><ispartof>Physics of fluids (1994), 2019-07, Vol.31 (7)</ispartof><rights>Author(s)</rights><rights>2019 Author(s). Published under license by AIP Publishing.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c358t-77b3f45975362d50594454d97fb50620a5d61628aa34e4cf84eac311cbf60c283</citedby><cites>FETCH-LOGICAL-c358t-77b3f45975362d50594454d97fb50620a5d61628aa34e4cf84eac311cbf60c283</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,794,4510,27922,27923</link.rule.ids></links><search><creatorcontrib>Hu, Xiao</creatorcontrib><creatorcontrib>Lin, Jianzhong</creatorcontrib><creatorcontrib>Ku, Xiaoke</creatorcontrib><title>Inertial migration of circular particles in Poiseuille flow of a power-law fluid</title><title>Physics of fluids (1994)</title><description>The immersed boundary-lattice Boltzmann method is used to study the inertial migration of particles in Poiseuille flow of a power-law fluid. The effects of Reynolds number, power-law index, and blockage ratio on the formation of particle trains are explored. The results show that single particle with different initial positions reach the same equilibrium position for the same power-law index. The stable equilibrium position moves closer to the centerline under the higher power-law index and blockage ratio. One-line of eight particles distributed initially at a vertical position will migrate laterally to the vicinity of the wall and form single-line particle trains. The particle spacing is unstable and increases when particles migrate to the equilibrium position. The inertial focusing length is an important factor for analyzing the formation of particle trains, which will be longer with increasing the power-law index. The mean particle spacing will be reduced with increasing Re and blockage ratio. Two-lines of 12 particles distributed initially and abreast along both sides of the centerline will migrate to the vicinity of the wall and form staggered particle trains. Due to the multiparticles interaction, the final particle equilibrium position will deviate from the single particle equilibrium position. The axial spacing between two neighboring particles is stable or fluctuates within a certain range. The particle spacing decreases with increasing the power-law index and blockage ratio, and with decreasing Re. The shear-thinning fluid is beneficial to the formation of single-line particle trains and staggered particle trains.</description><subject>Computational fluid dynamics</subject><subject>Equilibrium</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Inertial coordinates</subject><subject>Laminar flow</subject><subject>Migration</subject><subject>Physics</subject><subject>Power law</subject><subject>Reynolds number</subject><subject>Shear thinning (liquids)</subject><subject>Vertical orientation</subject><issn>1070-6631</issn><issn>1089-7666</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKsH_0HAk8LWfGf3KMWPQsEe9BzSbCIp6WZNdln896a2Z0_zMvMwwzwA3GK0wEjQR7zgGNWykWdgVkJTSSHE-SFLVAlB8SW4ynmHEKINETOwWXU2DV4HuPdfSQ8-djA6aHwyY9AJ9rpMTbAZ-g5uos929CFY6EKcDqCGfZxsqoKeSm_07TW4cDpke3Oqc_D58vyxfKvW76-r5dO6MpTXQyXlljrGG8mpIC1HvGGMs7aRbsuRIEjzVmBBaq0ps8y4mlltKMZm6wQypKZzcHfc26f4Pdo8qF0cU1dOKkIEKc9xiQp1f6RMijkn61Sf_F6nH4WROghTWJ2EFfbhyGbjhz8T_8C_2yNpXw</recordid><startdate>201907</startdate><enddate>201907</enddate><creator>Hu, Xiao</creator><creator>Lin, Jianzhong</creator><creator>Ku, Xiaoke</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>201907</creationdate><title>Inertial migration of circular particles in Poiseuille flow of a power-law fluid</title><author>Hu, Xiao ; Lin, Jianzhong ; Ku, Xiaoke</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c358t-77b3f45975362d50594454d97fb50620a5d61628aa34e4cf84eac311cbf60c283</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Computational fluid dynamics</topic><topic>Equilibrium</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Inertial coordinates</topic><topic>Laminar flow</topic><topic>Migration</topic><topic>Physics</topic><topic>Power law</topic><topic>Reynolds number</topic><topic>Shear thinning (liquids)</topic><topic>Vertical orientation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hu, Xiao</creatorcontrib><creatorcontrib>Lin, Jianzhong</creatorcontrib><creatorcontrib>Ku, Xiaoke</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physics of fluids (1994)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hu, Xiao</au><au>Lin, Jianzhong</au><au>Ku, Xiaoke</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Inertial migration of circular particles in Poiseuille flow of a power-law fluid</atitle><jtitle>Physics of fluids (1994)</jtitle><date>2019-07</date><risdate>2019</risdate><volume>31</volume><issue>7</issue><issn>1070-6631</issn><eissn>1089-7666</eissn><coden>PHFLE6</coden><abstract>The immersed boundary-lattice Boltzmann method is used to study the inertial migration of particles in Poiseuille flow of a power-law fluid. The effects of Reynolds number, power-law index, and blockage ratio on the formation of particle trains are explored. The results show that single particle with different initial positions reach the same equilibrium position for the same power-law index. The stable equilibrium position moves closer to the centerline under the higher power-law index and blockage ratio. One-line of eight particles distributed initially at a vertical position will migrate laterally to the vicinity of the wall and form single-line particle trains. The particle spacing is unstable and increases when particles migrate to the equilibrium position. The inertial focusing length is an important factor for analyzing the formation of particle trains, which will be longer with increasing the power-law index. The mean particle spacing will be reduced with increasing Re and blockage ratio. Two-lines of 12 particles distributed initially and abreast along both sides of the centerline will migrate to the vicinity of the wall and form staggered particle trains. Due to the multiparticles interaction, the final particle equilibrium position will deviate from the single particle equilibrium position. The axial spacing between two neighboring particles is stable or fluctuates within a certain range. The particle spacing decreases with increasing the power-law index and blockage ratio, and with decreasing Re. The shear-thinning fluid is beneficial to the formation of single-line particle trains and staggered particle trains.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.5108797</doi><tpages>15</tpages></addata></record> |
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subjects | Computational fluid dynamics Equilibrium Fluid dynamics Fluid flow Inertial coordinates Laminar flow Migration Physics Power law Reynolds number Shear thinning (liquids) Vertical orientation |
title | Inertial migration of circular particles in Poiseuille flow of a power-law fluid |
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