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Characteristics of the marangoni convection induced in initial quiescent water / Yong Sha in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8770–8777 Titre : Characteristics of the marangoni convection induced in initial quiescent water Type de document : texte imprimé Auteurs : Yong Sha, Auteur ; Hongling Chen, Auteur ; Yingwu Yin, Auteur Année de publication : 2010 Article en page(s) : pp. 8770–8777 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Marangoni  convection Résumé : By means of continuous deposition of the surface tension-lowering solvent at the quiescent water surface, the closed-loop Marangoni convection can be induced as a single convection cell at the air−water interface. For this single Marangoni convection cell, its temporal-spatial evolution is visualized by means of the shadowgraph optical method, and its surface radial velocity distribution is measured with the help of the high speed photography technique. Meanwhile, an absorption experiment of CO2 into water, a scaling analysis, and a 2-D numerical simulation are conducted, respectively, to investigate mass transfer performance and flow characteristics of the induced Marangoni convection. Results show that the induced Marangoni convection has the high surface velocity, the sharp velocity gradient is in the immediate vicinity of the water surface, and the velocity of the Marangoni convection in the bulk of water is much less than that near the interface. The high surface velocity of the Marangoni convection along with its closed-loop flow structure impels exchange of the solvent between the interfacial neighborhood and the bulk of liquid and enhances renewal of the interfacial fluid. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007163?journalCode=iecred [article] Characteristics of the marangoni convection induced in initial quiescent water [texte imprimé] / Yong Sha, Auteur ; Hongling Chen, Auteur ; Yingwu Yin, Auteur . - 2010 . - pp. 8770–8777. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8770–8777 Mots-clés : Marangoni  convection Résumé : By means of continuous deposition of the surface tension-lowering solvent at the quiescent water surface, the closed-loop Marangoni convection can be induced as a single convection cell at the air−water interface. For this single Marangoni convection cell, its temporal-spatial evolution is visualized by means of the shadowgraph optical method, and its surface radial velocity distribution is measured with the help of the high speed photography technique. Meanwhile, an absorption experiment of CO2 into water, a scaling analysis, and a 2-D numerical simulation are conducted, respectively, to investigate mass transfer performance and flow characteristics of the induced Marangoni convection. Results show that the induced Marangoni convection has the high surface velocity, the sharp velocity gradient is in the immediate vicinity of the water surface, and the velocity of the Marangoni convection in the bulk of water is much less than that near the interface. The high surface velocity of the Marangoni convection along with its closed-loop flow structure impels exchange of the solvent between the interfacial neighborhood and the bulk of liquid and enhances renewal of the interfacial fluid. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007163?journalCode=iecred