Thermal and solutal effects on convection inside a polymer solution droplet on a substrate

Masayuki Kaneda, Yuu Takao, Jun Fukai

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The convective flow inside polymer solution droplets drying on a lyophobic substrate is numerically studied. The evaporating droplet is presumed as a hemisphere shrinking with time at the constant contact angle. The thermal and solutal effects are simultaneously considered in the computation. The thermal Marangoni convection is induced due to the quick thermal diffusion, and this convection transports the solute resulting in the solutal Marangoni flow. The solutal dependence corresponds to our previous experimental work, but the flow pattern does not. Consideration of the pseudo evaporation rate distribution depending on the contact angle yields to the flow pattern correspondence.

Original languageEnglish
Pages (from-to)4448-4457
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Volume53
Issue number21-22
DOIs
Publication statusPublished - Jul 23 2010

Fingerprint

Polymer solutions
Flow patterns
Contact angle
temperature effects
flow distribution
convection
Marangoni convection
Thermal diffusion
evaporation rate
convective flow
polymers
thermal diffusion
Substrates
hemispheres
free convection
drying
Drying
solutes
Evaporation
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Thermal and solutal effects on convection inside a polymer solution droplet on a substrate. / Kaneda, Masayuki; Takao, Yuu; Fukai, Jun.

In: International Journal of Heat and Mass Transfer, Vol. 53, No. 21-22, 23.07.2010, p. 4448-4457.

Research output: Contribution to journalArticle

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