Gas―liquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices
Identifieur interne : 000547 ( Hal/Curation ); précédent : 000546; suivant : 000548Gas―liquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices
Auteurs : T. Fu [République populaire de Chine] ; Y. Ma [République populaire de Chine] ; D. Funfschilling [France] ; H. Z. Li [France]Source :
- Microfluidics and Nanofluidics [ 1613-4982 ] ; 2011.
English descriptors
Abstract
This communication describes the gas―liquid two-phase flow patterns and the formation of bubbles in non-Newtonian fluids in microfluidic flow-focusing devices. Experiments were conducted in two different polymethyl methacrylate (PMMA) square microchannels of, respectively, 600 x 600 and 400 x 400 μm. N2 bubbles were generated in non-Newtonian polyacrylamide (PAAm) solutions of different concentrations. Slug bubble, missile bubble, annular and intermittent flow patterns were observed at the cross-junction by varying gas and liquid flow rates. Gas and liquid flow rates, concentration of PAAm solutions, and channel size were varied to investigate their effect on the mechanism of bubble formation. The bubble size was proportional to the ratio of gas/ liquid flow rate for slug bubbles and could be scaled with the ratio of gas/liquid flow rate as a power―law relationship for missile bubbles under wide experimental conditions.
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DOI: 10.1007/s10404-010-0741-x
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Experiments were conducted in two different polymethyl methacrylate (PMMA) square microchannels of, respectively, 600 x 600 and 400 x 400 μm. N2 bubbles were generated in non-Newtonian polyacrylamide (PAAm) solutions of different concentrations. Slug bubble, missile bubble, annular and intermittent flow patterns were observed at the cross-junction by varying gas and liquid flow rates. Gas and liquid flow rates, concentration of PAAm solutions, and channel size were varied to investigate their effect on the mechanism of bubble formation. The bubble size was proportional to the ratio of gas/ liquid flow rate for slug bubbles and could be scaled with the ratio of gas/liquid flow rate as a power―law relationship for missile bubbles under wide experimental conditions.</div></front></TEI><hal api="V3"><titleStmt><title xml:lang="en">Gas―liquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices</title><author role="aut"><persName><forename type="first">T.</forename><surname>Fu</surname></persName><email></email><idno type="halauthor">515401</idno><affiliation ref="#struct-57266"></affiliation><affiliation ref="#struct-211875"></affiliation></author><author role="aut"><persName><forename type="first">Y.</forename><surname>Ma</surname></persName><email></email><idno type="halauthor">17238</idno><affiliation ref="#struct-57266"></affiliation></author><author role="aut"><persName><forename type="first">D.</forename><surname>Funfschilling</surname></persName><email></email><idno type="halauthor">308570</idno><affiliation ref="#struct-211875"></affiliation></author><author role="aut"><persName><forename type="first">H.Z.</forename><surname>Li</surname></persName><email></email><idno type="halauthor">623562</idno><affiliation ref="#struct-211875"></affiliation></author><editor role="depositor"><persName><forename>Josiane</forename><surname>Moras</surname></persName><email>josiane.moras@ensic.inpl-nancy.fr</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2011-07-06 09:21:38</date><date type="whenModified">2016-05-17 10:14:30</date><date type="whenReleased">2011-07-06 09:21:38</date><date type="whenProduced">2011</date></edition><respStmt><resp>contributor</resp><name key="109516"><persName><forename>Josiane</forename><surname>Moras</surname></persName><email>josiane.moras@ensic.inpl-nancy.fr</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">hal-00606319</idno><idno type="halUri">https://hal.archives-ouvertes.fr/hal-00606319</idno><idno type="halBibtex">fu:hal-00606319</idno><idno type="halRefHtml">Microfluidics and Nanofluidics, Springer Verlag, 2011, 10 ((5)), pp. 1135-1140. <10.1007/s10404-010-0741-x></idno><idno type="halRef">Microfluidics and Nanofluidics, Springer Verlag, 2011, 10 ((5)), pp. 1135-1140. <10.1007/s10404-010-0741-x></idno></publicationStmt><seriesStmt><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="LRGP-UL">LRGP</idno><idno type="stamp" n="UNIV-LORRAINE">Université de Lorraine</idno></seriesStmt><notesStmt><note type="audience" n="2">International</note><note type="popular" n="0">No</note><note type="peer" n="1">Yes</note></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Gas―liquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices</title><author role="aut"><persName><forename type="first">T.</forename><surname>Fu</surname></persName><idno type="halAuthorId">515401</idno><affiliation ref="#struct-57266"></affiliation><affiliation ref="#struct-211875"></affiliation></author><author role="aut"><persName><forename type="first">Y.</forename><surname>Ma</surname></persName><idno type="halAuthorId">17238</idno><affiliation ref="#struct-57266"></affiliation></author><author role="aut"><persName><forename type="first">D.</forename><surname>Funfschilling</surname></persName><idno type="halAuthorId">308570</idno><affiliation ref="#struct-211875"></affiliation></author><author role="aut"><persName><forename type="first">H.Z.</forename><surname>Li</surname></persName><idno type="halAuthorId">623562</idno><affiliation ref="#struct-211875"></affiliation></author></analytic><monogr><idno type="halJournalId" status="VALID">17085</idno><idno type="issn">1613-4982</idno><idno type="eissn">1613-4990</idno><title level="j">Microfluidics and Nanofluidics</title><imprint><publisher>Springer Verlag</publisher><biblScope unit="volume">10</biblScope><biblScope unit="issue">(5)</biblScope><biblScope unit="pp">pp. 1135-1140</biblScope><date type="datePub">2011</date></imprint></monogr><idno type="doi">10.1007/s10404-010-0741-x</idno></biblStruct></sourceDesc><profileDesc><langUsage><language ident="en">English</language></langUsage><textClass><keywords scheme="author"><term xml:lang="en">Microfluidics</term><term xml:lang="en">Gas-liquid flow</term><term xml:lang="en">Bubble</term><term xml:lang="en">Flow-focusing device</term><term xml:lang="en">Micro-PIV</term></keywords><classCode scheme="halDomain" n="spi.gproc">Engineering Sciences [physics]/Chemical and Process Engineering</classCode><classCode scheme="halTypology" n="ART">Journal articles</classCode></textClass><abstract xml:lang="en">This communication describes the gas―liquid two-phase flow patterns and the formation of bubbles in non-Newtonian fluids in microfluidic flow-focusing devices. Experiments were conducted in two different polymethyl methacrylate (PMMA) square microchannels of, respectively, 600 x 600 and 400 x 400 μm. N2 bubbles were generated in non-Newtonian polyacrylamide (PAAm) solutions of different concentrations. Slug bubble, missile bubble, annular and intermittent flow patterns were observed at the cross-junction by varying gas and liquid flow rates. Gas and liquid flow rates, concentration of PAAm solutions, and channel size were varied to investigate their effect on the mechanism of bubble formation. The bubble size was proportional to the ratio of gas/ liquid flow rate for slug bubbles and could be scaled with the ratio of gas/liquid flow rate as a power―law relationship for missile bubbles under wide experimental conditions.</abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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