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Document IIF

Mécanisme de la convection de Marangoni induite par l'ajout d'un agent tensio-actif à une solution aqueuse de bromure de lithium.

Mechanism of Marangoni convection induced by addition of a surfactant in lithium-bromide aqueous solutions.

Auteurs : NISHIMURA N., NOMURA T., IYOTA H., et al.

Résumé

Surface tension induced Marangoni-Benard convection occurring at the surface of a lithium-bromide aqueous solution with the addition of a small amount of surfactant was observed in order to investigate the mechanism of absorption enhancement by surfactants. Experiments were performed varying the initial surfactant's concentration from 0 to 200 ppm and the liquid layer thickness from 2 to 5 mm. Pentagonal or hexagonal cell patterns were clearly observed at the surface and these cells instantly grew in size from small to large. Thereafter, large-scale chaotic eddies were induced at the surface.

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Détails

  • Titre original : Mechanism of Marangoni convection induced by addition of a surfactant in lithium-bromide aqueous solutions.
  • Identifiant de la fiche : 2000-1318
  • Langues : Anglais
  • Source : 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Date d'édition : 19/09/1999

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