American Society of Civil Engineers


Effect of Particle Size on the Characteristics of Sand Jets in Water


by Amir Hossein Azimi, S.M.ASCE, (Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB, Canada T6G 2W2. E-mail: azimi@ualberta.ca), David Z. Zhu, (corresponding author), M.ASCE, (Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB, Canada T6G 2W2. E-mail: david.zhu@ualberta.ca), and Nallamuthu Rajaratnam, F.ASCE, (Professor Emeritus, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB, Canada T6G 2W2. E-mail: nrajaratnam@ualberta.ca)

Journal of Engineering Mechanics, Vol. 137, No. 12, December 2011, pp. 822-834, (doi:  http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0000283)

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Document type: Journal Paper
Abstract: 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.


ASCE Subject Headings:
Particle size
Turbulence
Numerical models
Computational fluid dynamics technique

Author Keywords:
CFD
Particle size
Sand jet
Turbulence
Water