OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Simulation of an avalanche in a fluid with a soft-sphere / immersed boundary method including a lubrication force

Izard, Edouard and Bonometti, Thomas and Lacaze, Laurent Simulation of an avalanche in a fluid with a soft-sphere / immersed boundary method including a lubrication force. (2014) Journal of Computational Multiphase Flows, 6 (4). 391-406. ISSN 1757-482X

[img]
Preview
(Document in English)

PDF (Publisher 's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
585kB

Official URL: http://dx.doi.org/10.1260/1757-482X.6.4.391

Abstract

The present work aims at reproducing the local dynamics of a dense granular media evolving in a viscous fluid from the grain scale to that of thousands of grains, encountered in environmental multiphase flows. To this end a soft-sphere collision / immersed-boundary method is developed. The methods are validated alone through various standard configurations including static and dynamical situations. Then, simulations of binary wall-particle collisions in a fluid are performed for a wide range of Stokes number ranging in [10-1, 104]. Good agreement with available experimental data is found provided that a local lubrication model is used. Finally, three-dimensional simulations of gravity/shear-driven dense granular flows in a viscous fluid are presented. The results open the way for a parametric study in the parameter space initial aspect ratio - initial packing.

Item Type:Article
Additional Information:Thanks to Multi-Science Publishing. The definitive version is available at http://multi-science.metapress.com/content/a7304955043057x0/
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)
Laboratory name:
Statistics:download
Deposited By: Thomas BONOMETTI
Deposited On:02 Feb 2015 14:46

Repository Staff Only: item control page