Experimental study of drop size distribution in the bag breakup regime / Hui Zhao in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9767-9773 Titre : Experimental study of drop size distribution in the bag breakup regime Type de document : texte imprimé Auteurs : Hui Zhao, Auteur ; Hai Feng Liu, Auteur ; Jian Liang Xu, Auteur Année de publication : 2011 Article en page(s) : pp. 9767-9773 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Particle size distribution Drop Résumé : The situation of a liquid drop exposed to a continuous air jet flow was investigated experimentally. The drop bag breakup of test liquids which included water, ethanol, and various glycerol mixtures was observed using a high-speed camera. The morphological change, such as drop deformation, was observed and analyzed. Mean fragment sizes were obtained, which were in good agreement with those reported in the literature. Big fragments formed from the ring contained the great mass of the initial drop and were studied in detail, and correlations on fragment mean size and number were obtained. Mean size decreased with the Weber number and increased with the Ohnesorge number; fragment number was in contrast to mean size. Fragment size distribution was another useful parameter. Our results showed that fragment size distribution based on the number formed from the ring was a gamma distribution. Fragment size distribution based on the number formed from the whole drop was an exponential distribution. We also investigated fragment size distribution based on the volume formed from the whole drop, which was a Rosin―Rammler distribution. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425222 [article] Experimental study of drop size distribution in the bag breakup regime [texte imprimé] / Hui Zhao, Auteur ; Hai Feng Liu, Auteur ; Jian Liang Xu, Auteur . - 2011 . - pp. 9767-9773. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9767-9773 Mots-clés : Particle size distribution Drop Résumé : The situation of a liquid drop exposed to a continuous air jet flow was investigated experimentally. The drop bag breakup of test liquids which included water, ethanol, and various glycerol mixtures was observed using a high-speed camera. The morphological change, such as drop deformation, was observed and analyzed. Mean fragment sizes were obtained, which were in good agreement with those reported in the literature. Big fragments formed from the ring contained the great mass of the initial drop and were studied in detail, and correlations on fragment mean size and number were obtained. Mean size decreased with the Weber number and increased with the Ohnesorge number; fragment number was in contrast to mean size. Fragment size distribution was another useful parameter. Our results showed that fragment size distribution based on the number formed from the ring was a gamma distribution. Fragment size distribution based on the number formed from the whole drop was an exponential distribution. We also investigated fragment size distribution based on the volume formed from the whole drop, which was a Rosin―Rammler distribution. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425222

Exemplaires(0)

Disponibilité
aucun exemplaire

Stagnation point offset of two opposed jets / Zhi-gang Sun in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5877–5883 Titre : Stagnation point offset of two opposed jets Type de document : texte imprimé Auteurs : Zhi-gang Sun, Auteur ; Wei-feng Li, Auteur ; Hai Feng Liu, Auteur Année de publication : 2010 Article en page(s) : pp. 5877–5883 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Axial velocity Stagnation point offset Impinging streamsSmoke wire visualization Hot-wire anemometry techniques Résumé : The axial velocity and the stagnation point offset of impinging streams from two opposed nozzles have been theoretically studied and experimentally measured by smoke wire visualization and hot-wire anemometry (HWA) techniques. The results show that, for small nozzle separation (L/D < 2), the equations based on Reynolds stress theory can be used to predict the stagnation point offset for two nozzles of the same size. For middle nozzle separation (2 ≤ L/D ≤ 12), the stagnation position is very sensitive to the exit velocity ratio and that it changes nonlinearly with increasing nozzle separation. For large nozzle separation (L/D > 12), the equations based on the free jet theory can be used to predict the stagnation point offset for two nozzles of the same and different sizes. The illustrated effects of the exit momentum ratio and the nozzle separation on the stagnation point offset are useful for defining the optimum conditions for many industrial applications of the opposed jets. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901056x [article] Stagnation point offset of two opposed jets [texte imprimé] / Zhi-gang Sun, Auteur ; Wei-feng Li, Auteur ; Hai Feng Liu, Auteur . - 2010 . - pp. 5877–5883. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5877–5883 Mots-clés : Axial velocity Stagnation point offset Impinging streamsSmoke wire visualization Hot-wire anemometry techniques Résumé : The axial velocity and the stagnation point offset of impinging streams from two opposed nozzles have been theoretically studied and experimentally measured by smoke wire visualization and hot-wire anemometry (HWA) techniques. The results show that, for small nozzle separation (L/D < 2), the equations based on Reynolds stress theory can be used to predict the stagnation point offset for two nozzles of the same size. For middle nozzle separation (2 ≤ L/D ≤ 12), the stagnation position is very sensitive to the exit velocity ratio and that it changes nonlinearly with increasing nozzle separation. For large nozzle separation (L/D > 12), the equations based on the free jet theory can be used to predict the stagnation point offset for two nozzles of the same and different sizes. The illustrated effects of the exit momentum ratio and the nozzle separation on the stagnation point offset are useful for defining the optimum conditions for many industrial applications of the opposed jets. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901056x

Exemplaires(0)

Disponibilité
aucun exemplaire