Imperial College London

DrSylvainLaizet

Faculty of EngineeringDepartment of Aeronautics

Senior Lecturer
 
 
 
//

Contact

 

+44 (0)20 7594 5045s.laizet Website

 
 
//

Location

 

339City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Espath:2015:10.1063/1.4921191,
author = {Espath, LFR and Pinto, LC and Laizet, S and Silvestrini, JH},
doi = {10.1063/1.4921191},
journal = {Physics of Fluids},
pages = {056604--056604},
title = {High-fidelity simulations of the lobe-and-cleft structures and the deposition map in particle-driven gravity currents},
url = {http://dx.doi.org/10.1063/1.4921191},
volume = {27},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The evolution of a mono-disperse gravity current in the lock-exchange configurationis investigated by means of direct numerical simulations for various Reynoldsnumbers and settling velocities for the deposition. We limit our investigations togravity currents over a flat bed in which density differences are small enough for theBoussinesq approximation to be valid. The concentration of particles is described inan Eulerian fashion by using a transport equation combined with the incompressibleNavier-Stokes equations. The most interesting results can be summarized asfollows: (i) the settling velocity is affecting the streamwise vortices at the head ofthe current with a substantial reduction of their size when the settling velocity isincreased; (ii) when the Reynolds number is increased the lobe-and-cleft structuresare merging more frequently and earlier in time, suggesting a strong Reynoldsnumber dependence for the spatio-temporal evolution of the head of the current;(iii) the temporal imprint of the lobe-and-cleft structures can be recovered fromthe deposition map, suggesting that the deposition pattern is defined purely andexclusively by the structures at the front of the current.
AU - Espath,LFR
AU - Pinto,LC
AU - Laizet,S
AU - Silvestrini,JH
DO - 10.1063/1.4921191
EP - 056604
PY - 2015///
SN - 1089-7666
SP - 056604
TI - High-fidelity simulations of the lobe-and-cleft structures and the deposition map in particle-driven gravity currents
T2 - Physics of Fluids
UR - http://dx.doi.org/10.1063/1.4921191
UR - http://hdl.handle.net/10044/1/24477
VL - 27
ER -