Effect of particle size on the characteristics of sand jets in water / Amir Hossein Azimi in Journal of engineering mechanics, Vol. 137 N° 12 (Decembre 2011)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 137 N° 12 (Decembre 2011) . - pp.822-834 Titre : Effect of particle size on the characteristics of sand jets in water Type de document : texte imprimé Auteurs : Amir Hossein Azimi, Auteur ; David Z. Zhu, Auteur ; Nallamuthu Rajaratnam, Auteur Année de publication : 2012 Article en page(s) : pp.822-834 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Particle size Turbulence Numerical models Computational fluid dynamics technique Résumé : Sand jets in water have extensive engineering applications. A detailed numerical modeling of sand jets in water was conducted at high initial sand concentration using a commercial computational fluid dynamics package (ANSYS CFX 11.0). The results of the numerical simulation were first compared with some recent laboratory experiments. Simulations were then conducted to investigate the effect of sand particle sizes on velocity distribution, concentration profile, and turbulent properties. Turbulent flow characteristics, such as turbulent kinetic energy, turbulence intensity, rate of energy dissipation, and turbulent eddy frequency, were evaluated and the trend compared with the previous studies in the literature. The location of maximum kinetic energy was found to be independent of particle size. The turbulent kinetic energy and rate of dissipation of the water phase decrease with increasing particle size. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i12/p822_s1?isAuthorized=no [article] Effect of particle size on the characteristics of sand jets in water [texte imprimé] / Amir Hossein Azimi, Auteur ; David Z. Zhu, Auteur ; Nallamuthu Rajaratnam, Auteur . - 2012 . - pp.822-834. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 137 N° 12 (Decembre 2011) . - pp.822-834 Mots-clés : Particle size Turbulence Numerical models Computational fluid dynamics technique Résumé : Sand jets in water have extensive engineering applications. A detailed numerical modeling of sand jets in water was conducted at high initial sand concentration using a commercial computational fluid dynamics package (ANSYS CFX 11.0). The results of the numerical simulation were first compared with some recent laboratory experiments. Simulations were then conducted to investigate the effect of sand particle sizes on velocity distribution, concentration profile, and turbulent properties. Turbulent flow characteristics, such as turbulent kinetic energy, turbulence intensity, rate of energy dissipation, and turbulent eddy frequency, were evaluated and the trend compared with the previous studies in the literature. The location of maximum kinetic energy was found to be independent of particle size. The turbulent kinetic energy and rate of dissipation of the water phase decrease with increasing particle size. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i12/p822_s1?isAuthorized=no

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