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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. (2014) Theoretical and Computational Fluid Dynamics, 28 (5). 521-529. ISSN 0935-4964

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Official URL: http://dx.doi.org/10.1007/s00162-014-0330-9

Abstract

We present the results from laboratory experiments and fully resolved simulations pertaining to finite-release turbulent density flows with a non-axisymmetric initial shape. First, we demonstrate that the effects of the initial shape influence the current’s evolution well into the long-time phase which would corresponds to the inertial self-similar phase in the case of planar or axisymmetric configurations. Then, we identify the physical mechanisms responsible for this dependence and propose a new model capable of capturing the dynamics of such releases. Finally, we show that this dependence on the initial configuration is robust for various types of gravity currents over a wide range of parameters such as Reynolds number, density ratio, and aspect ratio.

Item Type:Article
Additional Information:Thanks to Springer verlag editor. The original PDF of the article can be found at Theoretical and Computational Fluid Dynamics website : http://link.springer.com/journal/162
HAL Id:hal-01096696
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Florida (USA)
Laboratory name:
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Deposited By: Thomas BONOMETTI
Deposited On:22 Oct 2014 06:21

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