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Experimental and numerical investigations of two-phase (Liquid−Liquid) flow behavior in rectangular microchannels / Reddy Cherlo, Siva Kumar in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 893–899 Titre : Experimental and numerical investigations of two-phase (Liquid−Liquid) flow behavior in rectangular microchannels Type de document : texte imprimé Auteurs : Reddy Cherlo, Siva Kumar, Auteur ; Kariveti, Sreenath, Auteur ; S. Pushpavanam, Auteur Année de publication : 2010 Article en page(s) : pp 893–899 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : kinetics  Mass-transfer  Multiphase  microreactors  Two  phase  liquid  Rectangular  microchannels. Résumé : The interaction between kinetics and mass-transfer effects is determined by the flow regime in liquid−liquid multiphase microreactors. The operating conditions under which the various flow regimes such as slug flow and stratified flow occur in liquid−liquid systems has not been extensively studied and is not well-understood. The effect of operating conditions on slug length for instance is not well-known. The present study focuses on microreactors fabricated in Perspex (poly(methyl methaacrylate) (PMMA)), which are essentially microchannels with a rectangular cross-section. Experiments are carried out for a wide range of flow rates, channel sizes, and fluid systems with varying properties. Two different kinds of flow regimes, slug flow and stratified flow, are experimentally observed, and these are predicted using numerical simulations. We divide the space of operating conditions (the two liquid flow rates) into different regions such that in each region the flow regime is distinct. The dependence of slug length on flow rates and other parameters such as channel size, viscosity, surface tension, and contact angle have been determined and are quantitatively compared with predictions of simulations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900555e [article] Experimental and numerical investigations of two-phase (Liquid−Liquid) flow behavior in rectangular microchannels [texte imprimé] / Reddy Cherlo, Siva Kumar, Auteur ; Kariveti, Sreenath, Auteur ; S. Pushpavanam, Auteur . - 2010 . - pp 893–899. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 893–899 Mots-clés : kinetics  Mass-transfer  Multiphase  microreactors  Two  phase  liquid  Rectangular  microchannels. Résumé : The interaction between kinetics and mass-transfer effects is determined by the flow regime in liquid−liquid multiphase microreactors. The operating conditions under which the various flow regimes such as slug flow and stratified flow occur in liquid−liquid systems has not been extensively studied and is not well-understood. The effect of operating conditions on slug length for instance is not well-known. The present study focuses on microreactors fabricated in Perspex (poly(methyl methaacrylate) (PMMA)), which are essentially microchannels with a rectangular cross-section. Experiments are carried out for a wide range of flow rates, channel sizes, and fluid systems with varying properties. Two different kinds of flow regimes, slug flow and stratified flow, are experimentally observed, and these are predicted using numerical simulations. We divide the space of operating conditions (the two liquid flow rates) into different regions such that in each region the flow regime is distinct. The dependence of slug length on flow rates and other parameters such as channel size, viscosity, surface tension, and contact angle have been determined and are quantitatively compared with predictions of simulations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900555e