File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Droplet pinch-off with pressure fluctuations

TitleDroplet pinch-off with pressure fluctuations
Authors
KeywordsPinch-off
Droplet microfluidics
Nonuniversality
Pressure fluctuations
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ces
Citation
Chemical Engineering Science, 2019, v. 196, p. 333-343 How to Cite?
AbstractDynamics of Newtonian fluid pinch-off is universal, excluding the possibility of manipulating pinch-off behavior by varying initial and boundary conditions which is desirable in applications such as inkjet printing and microfluidics. Here we show that dynamics of two-fluid pinch-off with disturbed inlet pressure (such as the profile of conical liquid neck, cone slope, and neck thinning rate) depends on initial perturbations. The nonuniversality arises from pressure-fluctuation-induced nonlocal flow velocity that stretches the axial length scale of pinch-off region. We renormalize the disturbed pinch-off using the linear ratio, (1 + βε), with β being the empirical constant and ε the dimensionless pressure fluctuation. We further apply the pressure fluctuation in engineering pinch-off where the disturbed and undisturbed systems have identical pinch-off dynamics but distinct material properties. Our results could provide useful guidelines for controlling the breakup of liquid threads with extreme physical properties, such as ultrahigh viscosity and ultralow interfacial tension, in inkjet printing and microfluidics for a range of applications.
Persistent Identifierhttp://hdl.handle.net/10722/272915
ISSN
2019 Impact Factor: 3.871
2015 SCImago Journal Rankings: 1.073

 

DC FieldValueLanguage
dc.contributor.authorZhu, P-
dc.contributor.authorWang, L-
dc.date.accessioned2019-08-06T09:18:59Z-
dc.date.available2019-08-06T09:18:59Z-
dc.date.issued2019-
dc.identifier.citationChemical Engineering Science, 2019, v. 196, p. 333-343-
dc.identifier.issn0009-2509-
dc.identifier.urihttp://hdl.handle.net/10722/272915-
dc.description.abstractDynamics of Newtonian fluid pinch-off is universal, excluding the possibility of manipulating pinch-off behavior by varying initial and boundary conditions which is desirable in applications such as inkjet printing and microfluidics. Here we show that dynamics of two-fluid pinch-off with disturbed inlet pressure (such as the profile of conical liquid neck, cone slope, and neck thinning rate) depends on initial perturbations. The nonuniversality arises from pressure-fluctuation-induced nonlocal flow velocity that stretches the axial length scale of pinch-off region. We renormalize the disturbed pinch-off using the linear ratio, (1 + βε), with β being the empirical constant and ε the dimensionless pressure fluctuation. We further apply the pressure fluctuation in engineering pinch-off where the disturbed and undisturbed systems have identical pinch-off dynamics but distinct material properties. Our results could provide useful guidelines for controlling the breakup of liquid threads with extreme physical properties, such as ultrahigh viscosity and ultralow interfacial tension, in inkjet printing and microfluidics for a range of applications.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ces-
dc.relation.ispartofChemical Engineering Science-
dc.subjectPinch-off-
dc.subjectDroplet microfluidics-
dc.subjectNonuniversality-
dc.subjectPressure fluctuations-
dc.titleDroplet pinch-off with pressure fluctuations-
dc.typeArticle-
dc.identifier.emailZhu, P: pazhu@hku.hk-
dc.identifier.emailWang, L: lqwang@hku.hk-
dc.identifier.authorityWang, L=rp00184-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ces.2018.11.016-
dc.identifier.scopuseid_2-s2.0-85056724934-
dc.identifier.hkuros300433-
dc.identifier.volume196-
dc.identifier.spage333-
dc.identifier.epage343-
dc.publisher.placeUnited Kingdom-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats