On the induction criterion of the Marangoni convection at the gas/liquid interface

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie960370p· OSTI ID:452296

Lu, H H; Yang, Y M; Maa, J R ^[1]

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1. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Chemical Engineering

Some spreading solutes were found to be effective in enhancing the absorption rate by provoking interfacial turbulence at the gas-liquid surface. In this work, the induction criterion of the Marangoni convection is explored experimentally and theoretically by using aqueous solutions of normal alcohols and surfactants as spreading liquids. The experimental results show that aqueous solutions of methanol, ethanol, n-propanol, n-butanol, and n-pentanol may induce significant interfacial turbulence, and, on the other hand, aqueous solutions of n-hexanol, n-octanol, SDS, DTMAC, and Triton X-100 do not provoke noticeable interfacial turbulence. A dimensionless Marangoni number, Ma, based on film thickness {delta} is satisfactorily developed to evaluate the potentiality of a spreading liquid to produce interfacial turbulence. The critical Marangoni number, Ma, c, for the occurrence of the Marangoni convection is also determined.

• Sponsoring Organization: National Science Council, Taipei (Taiwan, Province of China)
• OSTI ID: 452296
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 2 Vol. 36; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ALCOHOLS
AQUEOUS SOLUTIONS
INTERFACES
LIQUID FLOW
MASS TRANSFER
SOLUTES
SURFACE TENSION
SURFACTANTS
TURBULENT FLOW