scholarly journals Capturing the Baroclinic Effect in non-Boussinesq Gravity Currents

2021 ◽  
pp. 100313
Author(s):  
Shengqi Zhang ◽  
Zhenhua Xia
Keyword(s):  
Gravity Currents ◽  
Baroclinic Effect

Secondary generation of breaking internal waves in confined basins by gravity currents

2021 ◽  
Vol 917 ◽  
Author(s):  
Yukinobu Tanimoto ◽  
Nicholas T. Ouellette ◽  
Jeffrey R. Koseff
Keyword(s):  
Internal Waves ◽  
Gravity Currents

Abstract

Gravity currents produced by lock exchange

2004 ◽  
Vol 521 ◽  
pp. 1-34 ◽  
Author(s):  
J. O. SHIN ◽  
S. B. DALZIEL ◽  
P. F. LINDEN
Keyword(s):  
Gravity Currents

Non-self-similar viscous gravity currents

2018 ◽  
Vol 3 (3) ◽  
Author(s):  
Bruce R. Sutherland ◽  
Kristen Cote ◽  
Youn Sub (Dominic) Hong ◽  
Luke Steverango ◽  
Chris Surma
Keyword(s):  
Gravity Currents ◽  
Self Similar

Particle settling from constant-flux surface gravity currents and a near-stationary particle-bearing layer

2021 ◽  
Vol 6 (6) ◽  
Author(s):  
Bruce R. Sutherland ◽  
Brianna Mueller ◽  
Brendan Sjerve ◽  
David Deepwell
Keyword(s):  
Gravity Currents ◽  
Surface Gravity ◽  
Particle Settling ◽  
Flux Surface ◽  
Constant Flux ◽  
Bearing Layer

The effects of gas flow on granular currents

2008 ◽  
Vol 366 (1873) ◽  
pp. 2191-2203 ◽  
Author(s):  
M.A Gilbertson ◽  
D.E Jessop ◽  
A.J Hogg
Keyword(s):  
Gas Flow ◽  
Gravity Currents ◽  
The Future ◽  
Particle Current

Currents of particles have been quite successfully modelled using techniques developed for fluid gravity currents. These models require the rheology of the currents to be specified, which is determined by the interaction between particles. For relatively small slow currents, this is determined primarily through friction, which can be controlled and reduced by fluidizing the particles, so that they may become much more mobile. Recent results cannot be predicted using many of the proposed models, and may be defined by the interaction between the particles and the fluid through which they are passing. However, in addition, particles that are only initially fluidized also form currents that are also mobile, but otherwise are different from continuously fluidized currents. The mobility of these currents appears not to be connected to the time taken for them to degas. This suggests that defining the continuous stresses on the particle current may not be sufficient to understand its motion and that a challenge for the future is to understand the structure of these flows and how this affects their motion.

The propagation of gravity currents in a V-shaped triangular cross-section channel: experiments and theory

2014 ◽  
Vol 754 ◽  
pp. 232-249 ◽  
Author(s):  
Marius Ungarish ◽  
Catherine A. Mériaux ◽  
Cathy B. Kurz-Besson
Keyword(s):  
Reynolds Number ◽  
Cross Section ◽  
Viscosity Coefficient ◽  
Gravity Currents ◽  
Quantitative Agreement ◽  
Flat Bottom ◽  
Special Configuration ◽  
Theoretical Predictions ◽  
Speed Of Propagation ◽  
High Reynolds

AbstractWe investigate the motion of high-Reynolds-number gravity currents (GCs) in a horizontal channel of V-shaped cross-section combining lock-exchange experiments and a theoretical model. While all previously published experiments in V-shaped channels were performed with the special configuration of the full-depth lock, we present the first part-depth experiment results. A fixed volume of saline, that was initially of length $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}x_0$ and height $h_0$ in a lock and embedded in water of height $H_0$ in a long tank, was released from rest and the propagation was recorded over a distance of typically $ 30 x_0$. In all of the tested cases the current displays a slumping stage of constant speed $u_N$ over a significant distance $x_S$, followed by a self-similar stage up to the distance $x_V$, where transition to the viscous regime occurs. The new data and insights of this study elucidate the influence of the height ratio $H = H_0/h_0$ and of the initial Reynolds number ${\mathit{Re}}_0 = (g^{\prime }h_0)^{{{1/2}}} h_0/ \nu $, on the motion of the triangular GC; $g^{\prime }$ and $\nu $ are the reduced gravity and kinematic viscosity coefficient, respectively. We demonstrate that the speed of propagation $u_N$ scaled with $(g^{\prime } h_0)^{{{1/2}}}$ increases with $H$, while $x_S$ decreases with $H$, and $x_V \sim [{\mathit{Re}}_0(h_0/x_0)]^{{4/9}}$. The initial propagation in the triangle is 50 % more rapid than in a standard flat-bottom channel under similar conditions. Comparisons with theoretical predictions show good qualitative agreements and fair quantitative agreement; the major discrepancy is an overpredicted $u_N$, similar to that observed in the standard flat bottom case.

scholarly journals Dynamics of lock-release crystalline gravity currents

2017 ◽  
Vol 1 (4) ◽  
pp. 213-218
Author(s):  
M. D. Sharifuzzaman ◽  
Charles J. Lemckert ◽  
Amir Etemad-Shahidi
Keyword(s):  
Gravity Currents
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