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Communication Dans Un Congrès Année : 2016

Localized fluidization in a granular medium: Parametric study with a physical model of “sand boiling”

Fluidisation localisée d'un milieu granulaire : étude paramétrique avec un modèle physique de "sable bouillonnant"

Résumé

The present study investigates steady-state localized fluidization within a granular bed by means of experiments on a physical model using a direct internal visualization by means of combined optical techniques. The experimental setup allows access to a broad range of control parameters with the purpose of extending previous findings on this specific configuration, in particular regarding the critical flow rate needed to generate a chimney fluidization. A saturation of this critical flow rate with bed height is and can be ex-plained by a purely hydrodynamic effect related to the geometry and the permeability of the bed which rule together the development of the upward fluid flow through the initially static granular bed. A quantitative model based on CFD simulations is successfully developed in good agreement with the experimental findings.
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Dates et versions

hal-02605288 , version 1 (16-05-2020)

Identifiants

Citer

P. Philippe, P. Cuéllar, L.H. Luu, S. Mena, J.S. Curtis. Localized fluidization in a granular medium: Parametric study with a physical model of “sand boiling”. 8th International Conference on Scour and Erosion, Sep 2016, Oxford, United Kingdom. pp.7. ⟨hal-02605288⟩
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