Paper Info
Title
Reynolds number and settling velocity influence for finite-release particle-laden gravity currents in a basin.
Abstract
Three-dimensional highly resolved Direct Numerical Simulations (DNS) of particle-laden gravity currents are presented for the lock-exchange problem in an original basin configuration, similar to delta formation in lakes. For this numerical study, we focus on gravity currents over a flat bed for which density differences are small enough for the Boussinesq approximation to be valid. The concentration of particles is described in an Eulerian fashion by using a transport equation combined with the incompressible Navier-Stokes equations, with the possibility of particles deposition but no erosion nor re-suspension. The focus of this study is on the influence of the Reynolds number and settling velocity on the development of the current which can freely evolve in the streamwise and spanwise direction. It is shown that the settling velocity has a strong influence on the spatial extent of the current, the sedimentation rate, the suspended mass and the shape of the lobe-and-cleft structures while the Reynolds number is mainly affecting the size and number of vortical structures at the front of the current, and the energy budget.
Year
DOI
Venue
2018
10.1016/j.cageo.2017.09.010
Computers & Geosciences
Keywords
Field
DocType
Particle-laden gravity current,Energy budget,Deposition of particles,Direct numerical simulation
Settling,Direct numerical simulation,Convection–diffusion equation,Reynolds number,Gravity current,Mechanics,Sedimentation,Statistics,Classical mechanics,Particle,Physics,Boussinesq approximation (water waves)
Journal
Volume
ISSN
Citations 
110
0098-3004
0
PageRank 
References 
Authors
0.34
2
4
Name
Order
Citations
PageRank
E. P. Francisco100.34
L. F. R. Espath201.35
S. Laizet3163.16
J. H. Silvestrini401.01