Marangoni flows in polymer solution droplets drying on heating surfaces

Shohei Yasumatsu, Koichi Nakaso, Jun Fukai

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect on substrate temperature on the fluid dynamics in a polymer solution droplet evaporating on a substrate is investigated experimentally and numerically. It is found from the experiments that fluid velocities in the droplets increase with increasing initial substrate temperature and with decreasing initial solute concentration. A mathematical model, which takes thermal and solutal Marangonl effects into account, are numerically solved using a finite element method. The calculated fluid velocities agree with the experiment. Both experiments and calculations show that, though thermal Marangonl forces dominate the fluid dynamics, solute Marangonl forces should never be neglected. The calculations predict that solute Marangonl effects are more emphasized with decreasing contact angle.

Original languageEnglish
Pages (from-to)128-135
Number of pages8
JournalJournal of Chemical Engineering of Japan
Volume45
Issue number2
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Polymer solutions
Drying
Fluid dynamics
Heating
Substrates
Fluids
Experiments
Contact angle
Mathematical models
Finite element method
Temperature
Hot Temperature

Keywords

  • Drying
  • Free convection
  • Inkjet

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Marangoni flows in polymer solution droplets drying on heating surfaces. / Yasumatsu, Shohei; Nakaso, Koichi; Fukai, Jun.

In: Journal of Chemical Engineering of Japan, Vol. 45, No. 2, 2012, p. 128-135.

Research output: Contribution to journalArticle

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