Abstract
Abstract
Highlights
Gravity currents are flows driven by density differences and occur ubiquitously in natural and man-made environments (Simpson 1997; Ungarish 2009)
For the planar gravity currents propagating on a favourable slope, Beghin et al (1981) observed that planar gravity currents may go through an acceleration phase followed by a deceleration phase, and developed the thermal theory to describe the two phases of motion
Dai (2013a, 2014) further categorised the deceleration phase of the planar gravity currents propagating on a favourable slope into an early stage, where the buoyancy force is in balance with the inertia force, and a late stage, where the buoyancy force is in balance with the viscous force
Summary
Gravity currents are flows driven by density differences and occur ubiquitously in natural and man-made environments (Simpson 1997; Ungarish 2009). Compared with the planar gravity currents, the gravity currents propagating on a horizontal or sloping boundary without being bounded in the spanwise direction have received less attention (Cantero, Balachandar & Garcia 2007; La Rocca et al 2008; Sahuri et al 2015; Dai & Wu 2016; Inghilesi et al 2018). This configuration is more similar to that of turbidity currents down a continental shelf and powder snow avalanches (Hopfinger 1983; Ouillon, Meiburg & Sutherland 2019).
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