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Numerical simulations of short- and long-range interaction forces in turbulent particle-laden gas flows

Boutsikakis, Athanasios and Fede, Pascal and Simonin, Olivier Numerical simulations of short- and long-range interaction forces in turbulent particle-laden gas flows. (2019) In: 10th International Conference on Multiphase Flow, 19 May 2019 - 24 May 2019 (Rio de Janiero, Brazil). (Unpublished)

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Abstract

Particulate flows are found in many practical applications from geophysical flows (pyroclastic flow, sediments transport, volcano ashes dispersion, ...) to industrial applications (olefin polymerization, Fluid Catalytic Cracking, silo discharge, ...). The physical phenomena present are complex: transport by gas, inter-particle collisions, rebounds on the walls, heat transfer, or interactions due to electric field. Among these phenomena, the understanding and modeling of short- and long-range interaction forces, that have been long time neglected, is today a priority. Indeed, forces (electrostatic or van der Walls) seem to play an important role on the hydrodynamics of both dilute and dense gas-particle flows. For example, in dilute turbulent gas-particle flows non-uniform particle distributions can arise on a macroscopic scale as a result of static electrification, a phenomenon that affects the hydrodynamics considerably. Nevertheless, most of the modeling efforts for segregation and preferential concentration of particles have focused on hydrodynamic or gravity mechanisms, while electrostatics can have a considerable if not more significant effect. Therefore, a detailed model of the electrostatic interactions and high-fidelity numerical simulations of such flows are necessary in order to describe these phenomena more accurately and understand their underlying mechanisms.

Item Type:Conference or Workshop Item (Paper)
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)
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Deposited On:14 Oct 2020 13:54

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