A study of retardation of the thermocapillary flow caused by surfactant addition

Tzu Chiang Wu, Yu Min Yang, Jer Ru Maa

Research output: Contribution to journalArticle

Abstract

Surfactant effect on thermocapillary flow that artificially provoked by a steady point heat source at an air/liquid interface was studied. The experimentally measured surface velocity and temperature profiles reveal that small amounts of SDS in ethylene glycol retard significantly the thermocapillary flow. A dimensionless elasticity number E, which is a ratio of the surfactant-induced restoring force to the thermocapillary force that triggers the flow, is proposed to express the interplay of concentration and temperature effects on interfacial turbulence. The data of this highly viscous liquid together with those of water in a previous work were examined and shown to be satisfactorily correlated by an equation developed in terms of the elasticity number.

Original languageEnglish
Pages (from-to)357-367
Number of pages11
JournalInternational Communications in Heat and Mass Transfer
Volume28
Issue number3
DOIs
Publication statusPublished - 2001 Apr 1

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Surface-Active Agents
Elasticity
Surface active agents
surfactants
Ethylene Glycol
Liquids
elastic properties
Ethylene glycol
Thermal effects
liquid air
Turbulence
heat sources
temperature profiles
temperature effects
Water
glycols
ethylene
velocity distribution
Air
actuators

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

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A study of retardation of the thermocapillary flow caused by surfactant addition. / Wu, Tzu Chiang; Yang, Yu Min; Maa, Jer Ru.

In: International Communications in Heat and Mass Transfer, Vol. 28, No. 3, 01.04.2001, p. 357-367.

Research output: Contribution to journalArticle

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