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Analytical and practical analysis of frictional-kinetic model for dense and dilute gas-solid flows

Fede, Pascal and Audard, François and Belut, Emmanuel and Fontaine, Jean-Raymond and Simonin, Olivier Analytical and practical analysis of frictional-kinetic model for dense and dilute gas-solid flows. (2016) In: 9th International Conference on Multiphase Flow (ICMF 2016), 22 May 2016 - 27 May 2016 (Firenze, Italy).

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Abstract

In granular flows, when the solid volume fraction is large, the dynamic behaviour of particles becomes controlled by frictional effects. Theoretically these effects can not be taken into account in an Eulerian approach, based on the kinetic theory of granular flows, because the inter-particle contact times are long. However, in the literature several empirical models have been proposed which introduce a frictional pressure and viscosity. In the paper, these models are first compared on a simple case of sheared dense granular flows in order to analyze the individual behavior of each model. Second, the models have been implemented in an Eulerian solver and numerical simulations have been performed of an experiment of bin discharge. The results show that for large diameter, the solid mass flow rate is well predicted, while it is systematically underestimated when the ratio between the injector diameter and the diameter of particles is small.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to the ICMF. This paper appears in : Proceedings of the 9th International Conference on Multiphase Flow (ICMF 2016).
HAL Id:hal-01715389
Audience (conference):International conference 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)
Other partners > Institut National de Recherche et Sécurité - INRS (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:01 Feb 2018 16:56

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