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Numerical simulation of dynamics and heat transfer associated with a single bubble in subcooled boiling and in the presence of noncondensables / Jinfeng Wu in Journal of heat transfer, Vol. 133 N° 4 (Avril 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [041502/1-14] Titre : Numerical simulation of dynamics and heat transfer associated with a single bubble in subcooled boiling and in the presence of noncondensables Type de document : texte imprimé Auteurs : Jinfeng Wu, Auteur ; Vijay K. Dhir, Auteur Année de publication : 2011 Article en page(s) : pp. [041502/1-14] Note générale : Physique Langues : Anglais (eng) Mots-clés : Subcooled  nucleate  boiling  Level-set  method  Moving  mesh  method  Numerical  simulation  Condensation  Noncondensable Index. décimale : 536 Chaleur. Thermodynamique Résumé : During phase change at the bubble-liquid interface, under subcooled boiling conditions, noncondensable gases dissolved in the liquid will be injected into the bubble along with vapor. Due to heat transfer into subcooled liquid, vapor will condense in the upper regions of the bubble while noncondensables will continue to accumulate. Subsequently, thermocapillary convection caused by nonuniform saturation temperature at the interface may occur. The aim of this work is to investigate the effects of noncondensables on heat transfer and bubble dynamics. The numerical results show that the effects of noncondensables on 5°C subcooled boiling of water are minor in terms of the equilibrium bubble diameter and overall Nusselt number. However, induced flow pattern around the bubble is altered, especially under reduced gravity conditions. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] Numerical simulation of dynamics and heat transfer associated with a single bubble in subcooled boiling and in the presence of noncondensables [texte imprimé] / Jinfeng Wu, Auteur ; Vijay K. Dhir, Auteur . - 2011 . - pp. [041502/1-14]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [041502/1-14] Mots-clés : Subcooled  nucleate  boiling  Level-set  method  Moving  mesh  method  Numerical  simulation  Condensation  Noncondensable Index. décimale : 536 Chaleur. Thermodynamique Résumé : During phase change at the bubble-liquid interface, under subcooled boiling conditions, noncondensable gases dissolved in the liquid will be injected into the bubble along with vapor. Due to heat transfer into subcooled liquid, vapor will condense in the upper regions of the bubble while noncondensables will continue to accumulate. Subsequently, thermocapillary convection caused by nonuniform saturation temperature at the interface may occur. The aim of this work is to investigate the effects of noncondensables on heat transfer and bubble dynamics. The numerical results show that the effects of noncondensables on 5°C subcooled boiling of water are minor in terms of the equilibrium bubble diameter and overall Nusselt number. However, induced flow pattern around the bubble is altered, especially under reduced gravity conditions. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]

Numerical simulations of the dynamics and heat transfer associated with a single bubble in subcooled pool boiling / Jinfeng Wu in Journal of heat transfer, Vol. 132 N° 11 (Novembre 2010) 

Public ISBD [article]  in Journal of heat transfer > Vol. 132 N° 11 (Novembre 2010) . - pp. [111501-1/15] Titre : Numerical simulations of the dynamics and heat transfer associated with a single bubble in subcooled pool boiling Type de document : texte imprimé Auteurs : Jinfeng Wu, Auteur ; Vijay K. Dhir, Auteur Année de publication : 2010 Article en page(s) : pp. [111501-1/15] Note générale : Physique Langues : Anglais (eng) Mots-clés : Subcooled  nucleate  boiling  Level-set  method  Moving  mesh  method  Numerical  simulation  Condensation Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, numerical simulations of a vapor bubble in subcooled pool boiling have been performed. The applied numerical procedure coupling level-set function with moving mesh method has been validated by comparing the results of bubble-growth history including bubble departure diameter with data from experiments. The predictions of bubble dynamics and heat transfer for various subcoolings as well as different gravity levels are presented. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Numerical simulations of the dynamics and heat transfer associated with a single bubble in subcooled pool boiling [texte imprimé] / Jinfeng Wu, Auteur ; Vijay K. Dhir, Auteur . - 2010 . - pp. [111501-1/15]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 11 (Novembre 2010) . - pp. [111501-1/15] Mots-clés : Subcooled  nucleate  boiling  Level-set  method  Moving  mesh  method  Numerical  simulation  Condensation Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, numerical simulations of a vapor bubble in subcooled pool boiling have been performed. The applied numerical procedure coupling level-set function with moving mesh method has been validated by comparing the results of bubble-growth history including bubble departure diameter with data from experiments. The predictions of bubble dynamics and heat transfer for various subcoolings as well as different gravity levels are presented. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]