Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34353
Title: Modeling instantaneous discharge of unsorted particle cloud in ambient water by an Eulerian-Lagrangian method
Authors: Gu, J
Li, CW 
Keywords: Sediment discharge
3D numerical model
Hydrodynamic behavior
Issue Date: 2004
Publisher: Taylor & Francis published on behalf of the International Association for Hydro-Environment Engineering and Research
Source: Journal of hydraulic research, 2004, v. 42, no. 4, p. 399-405 How to cite?
Journal: Journal of hydraulic research 
Abstract: The mixing characteristics of waste particles (e.g. dredged sediments) of variable size discharged into ambient water is studied numerically by an Eulerian-Lagrangian method. A three-dimensional (3D) numerical model using the modified κ-ε parameterization of turbulence for the fluid phase (water) and a Lagrangian method for the solid phase (particles) has been developed. In the model the wake turbulence induced by particles has been included as additional source and sink terms in the κ-ε model; and the variable drift velocities of the particles are treated efficiently by the Lagrangian method in which the particles are tracked explicitly and the diffusion process is approximated by a random walk model. The hydrodynamic behavior of dumping a cloud of particles is governed by the total buoyancy of the cloud, and the drag force on each particle. The computed results show a roughly linear relationship between the displacement of the frontal position and the longitudinal width of the particle cloud. Radial vortices appear before the particles reach the bottom. The particle size distribution in the cloud affects the rate of increase of the cloud size, as well as the rate of change of frontal position. The largest particles in the cloud dominate the flow behavior. The computed results are compared with the results of laboratory experiments and satisfactory agreement is obtained.
URI: http://hdl.handle.net/10397/34353
ISSN: 0022-1686
EISSN: 1814-2079
DOI: 10.1080/00221686.2004.9641207
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

12
Last Week
0
Last month
0
Citations as of Nov 17, 2017

Page view(s)

40
Last Week
1
Last month
Checked on Nov 12, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.