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Long-Lasting Effect of Initial Configuration in Gravitational Spreading of Material Fronts

Zgheib, Nadim and Bonometti, Thomas and Balachandar, Sivaramakrishnan Long-Lasting Effect of Initial Configuration in Gravitational Spreading of Material Fronts. (2013) In: 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 November 2013 - 26 November 2013 (Pittsburgh, Pennsylvania, United States). (Unpublished)

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Abstract

We present results from experiments and simulations pertaining to finite release gravity currents with a non-axisymmetric cross-section. First, we demonstrate that, contrary to expectation, the effects of the initial shape strongly influence the current's evolution well into the self-similar phases. Then we identify the physical mechanisms responsible for this dependence and propose a simple model capable of well capturing the dynamics of such releases. Finally, we show that this dependence on initial configuration is robust for various types of gravity currents (homogeneous and inhomogeneous) over a wide range of parameters such as Reynolds number, density ratio, wall friction and aspect ratio. We additionally inspect the deposition patterns pertaining to the abovementioned inhomogeneous currents.

Item Type:Conference or Workshop Item (Speech)
Audience (conference):International conference without published proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Florida (USA)
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Deposited On:24 Jun 2014 09:02

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