Dynamic surface effect on boiling of aqueous surfactant solutions

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Boiling of aqueous surfactant solutions is known to be drastically different from that of pure water. The experimental results showed that a small amount of surfactant additive makes the nucleate boiling heat transfer coefficient, hb, considerably higher, and that there is an optimum additive concentration for higher heat fluxes. Beyond this optimum point, further increase in additive concentration makes hb lower. In this work, the effect of surfactant additive on boiling is attributed to the departure from equilibrium surface tension which is produced by extension of the vapor-liquid interface during growth and coalescence of vapor bubbles in the vicinity of boiling surface. The surface tension of a surfactant solution is higher than the static value because the surfactant component cannot diffuse to the adsorbed layer promptly. This dynamic surface effect can be expressed by the Y (≡c(dσ/dc)2) value which is shown to be a representation of the elasticity of an adsorbed film as well. The similarity between the increment of hb due to the addition of surfactant and the Y curves indicates that the dynamic surface effect may play an important role in the boiling process of aqueous surfactant solutions.

Original languageEnglish
Pages (from-to)711-727
Number of pages17
JournalInternational Communications in Heat and Mass Transfer
Volume17
Issue number6
DOIs
Publication statusPublished - 1990 Jan 1

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Surface-Active Agents
boiling
Boiling liquids
Surface active agents
surfactants
Surface tension
interfacial tension
Vapors
nucleate boiling
Nucleate boiling
liquid-vapor interfaces
heat transfer coefficients
Bubbles (in fluids)
Coalescence
Heat transfer coefficients
coalescing
Heat flux
heat flux
Elasticity
bubbles

All Science Journal Classification (ASJC) codes

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

Cite this

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Dynamic surface effect on boiling of aqueous surfactant solutions. / Yang, Yu Min.

In: International Communications in Heat and Mass Transfer, Vol. 17, No. 6, 01.01.1990, p. 711-727.

Research output: Contribution to journalArticle

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