Flow-field dynamics during droplet formation by dripping in hydrodynamic-focusing microfluidics.
Identifieur interne : 000122 ( PubMed/Corpus ); précédent : 000121; suivant : 000123Flow-field dynamics during droplet formation by dripping in hydrodynamic-focusing microfluidics.
Auteurs : D. Funfschilling ; H. Debas ; H-Z Li ; T G MasonSource :
- Physical review. E, Statistical, nonlinear, and soft matter physics [ 1539-3755 ] ; 2009.
Abstract
Using microscopic particle image velocimetry, we examine the flow field around an oil droplet as it is formed by hydrodynamic focusing in an aqueous solution using a pressure-driven cross-channel microfluidic device. By detecting the temporal dependence of the instantaneous flow fields of the continuous phase in the dripping regime, we show that shear is not the primary mechanism that initiates droplet formation in our low flow rate and moderate capillary number experimental conditions. Instead, the advancing finger of oil partially and temporarily plugs the outlet channel, creating a pressure difference that builds up and is released when water from the side channels pushes the tip of the finger into the outlet channel, thereby facilitating the birth of the droplet by interfacial pinch-off that is primarily initiated by an extensional flow.
DOI: 10.1103/PhysRevE.80.015301
PubMed: 19658759
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Debas</name></author><author><name sortKey="Li, H Z" sort="Li, H Z" uniqKey="Li H" first="H-Z" last="Li">H-Z Li</name></author><author><name sortKey="Mason, T G" sort="Mason, T G" uniqKey="Mason T" first="T G" last="Mason">T G Mason</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:19658759</idno><idno type="pmid">19658759</idno><idno type="doi">10.1103/PhysRevE.80.015301</idno><idno type="wicri:Area/PubMed/Corpus">000122</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000122</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Flow-field dynamics during droplet formation by dripping in hydrodynamic-focusing microfluidics.</title><author><name sortKey="Funfschilling, D" sort="Funfschilling, D" uniqKey="Funfschilling D" first="D" last="Funfschilling">D. Funfschilling</name><affiliation><nlm:affiliation>LSGC, Nancy-Université, CNRS, 1 rue Grandville, BP20451, F-54001 Nancy, France. denis.funfschilling@ensic.inpl-nancy.fr</nlm:affiliation></affiliation></author><author><name sortKey="Debas, H" sort="Debas, H" uniqKey="Debas H" first="H" last="Debas">H. Debas</name></author><author><name sortKey="Li, H Z" sort="Li, H Z" uniqKey="Li H" first="H-Z" last="Li">H-Z Li</name></author><author><name sortKey="Mason, T G" sort="Mason, T G" uniqKey="Mason T" first="T G" last="Mason">T G Mason</name></author></analytic><series><title level="j">Physical review. E, Statistical, nonlinear, and soft matter physics</title><idno type="ISSN">1539-3755</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Using microscopic particle image velocimetry, we examine the flow field around an oil droplet as it is formed by hydrodynamic focusing in an aqueous solution using a pressure-driven cross-channel microfluidic device. By detecting the temporal dependence of the instantaneous flow fields of the continuous phase in the dripping regime, we show that shear is not the primary mechanism that initiates droplet formation in our low flow rate and moderate capillary number experimental conditions. Instead, the advancing finger of oil partially and temporarily plugs the outlet channel, creating a pressure difference that builds up and is released when water from the side channels pushes the tip of the finger into the outlet channel, thereby facilitating the birth of the droplet by interfacial pinch-off that is primarily initiated by an extensional flow.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">19658759</PMID><DateCreated><Year>2009</Year><Month>08</Month><Day>07</Day></DateCreated><DateCompleted><Year>2009</Year><Month>11</Month><Day>09</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1539-3755</ISSN><JournalIssue CitedMedium="Print"><Volume>80</Volume><Issue>1 Pt 2</Issue><PubDate><Year>2009</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Physical review. E, Statistical, nonlinear, and soft matter physics</Title><ISOAbbreviation>Phys Rev E Stat Nonlin Soft Matter Phys</ISOAbbreviation></Journal><ArticleTitle>Flow-field dynamics during droplet formation by dripping in hydrodynamic-focusing microfluidics.</ArticleTitle><Pagination><MedlinePgn>015301</MedlinePgn></Pagination><Abstract><AbstractText>Using microscopic particle image velocimetry, we examine the flow field around an oil droplet as it is formed by hydrodynamic focusing in an aqueous solution using a pressure-driven cross-channel microfluidic device. By detecting the temporal dependence of the instantaneous flow fields of the continuous phase in the dripping regime, we show that shear is not the primary mechanism that initiates droplet formation in our low flow rate and moderate capillary number experimental conditions. Instead, the advancing finger of oil partially and temporarily plugs the outlet channel, creating a pressure difference that builds up and is released when water from the side channels pushes the tip of the finger into the outlet channel, thereby facilitating the birth of the droplet by interfacial pinch-off that is primarily initiated by an extensional flow.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Funfschilling</LastName><ForeName>D</ForeName><Initials>D</Initials><AffiliationInfo><Affiliation>LSGC, Nancy-Université, CNRS, 1 rue Grandville, BP20451, F-54001 Nancy, France. denis.funfschilling@ensic.inpl-nancy.fr</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Debas</LastName><ForeName>H</ForeName><Initials>H</Initials></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>H-Z</ForeName><Initials>HZ</Initials></Author><Author ValidYN="Y"><LastName>Mason</LastName><ForeName>T G</ForeName><Initials>TG</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2009</Year><Month>07</Month><Day>06</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Phys Rev E Stat Nonlin Soft Matter Phys</MedlineTA><NlmUniqueID>101136452</NlmUniqueID><ISSNLinking>1539-3755</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2008</Year><Month>5</Month><Day>6</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2009</Year><Month>3</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="aheadofprint"><Year>2009</Year><Month>7</Month><Day>6</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>8</Month><Day>8</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>8</Month><Day>8</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>8</Month><Day>8</Day><Hour>9</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">19658759</ArticleId><ArticleId IdType="doi">10.1103/PhysRevE.80.015301</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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