Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Pattern formation in oil-in-water emulsions exposed to a salt gradient
Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA..
Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.;Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA..
KTH, Centra, SeRC - Swedish e-Science Research Centre. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA..
Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA..
Vise andre og tillknytning
2019 (engelsk)Inngår i: Physical Review Fluids, E-ISSN 2469-990X, Vol. 4, nr 8, artikkel-id 084307Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Flow instabilities can occur in a fluid system with two components that have significantly different diffusivities and that have opposite effects on the fluid density, as is the scenario in traditional double-diffusive convection. Here, we experimentally show that an oil-in-water emulsion exposed to salt concentration gradients generates a flowerlike pattern driven by vertical and azimuthal instabilities. We also report numerical and analytical studies to elaborate on the mechanism, the instability criteria, and the most unstable modes that determine the details of the observed patterns. We find that the instability is driven by buoyancy and stems from the differential transport between the dissolved salt and the suspended oil droplets, which have opposing effects on the density of the medium. Consequently, we identify a criterion for the development of the instability that involves the relative densities and concentrations of the salt and oil droplets. We also argue that the typical wave number of the pattern formed scales with the Peclet number of the salt, which here is equivalent to the Rayleigh number since the flow is driven by buoyancy. We find good agreement of these predictions with both experiments and numerical simulations.

sted, utgiver, år, opplag, sider
AMER PHYSICAL SOC , 2019. Vol. 4, nr 8, artikkel-id 084307
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-259437DOI: 10.1103/PhysRevFluids.4.084307ISI: 000483355400002Scopus ID: 2-s2.0-85072025648OAI: oai:DiVA.org:kth-259437DiVA, id: diva2:1353593
Merknad

QC 20190923

Tilgjengelig fra: 2019-09-23 Laget: 2019-09-23 Sist oppdatert: 2019-09-23bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Zhu, Lailai

Søk i DiVA

Av forfatter/redaktør
Zhu, Lailai
Av organisasjonen
I samme tidsskrift
Physical Review Fluids

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 4 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf