A novel coupled fluid–particle DEM for simulating dense granular slurry dynamics

We study two-dimensional flow of a granular slurry in a lid driven cavity using novel coupled fluid–particle discrete element simulations. The particles are assumed to be linearly elastic and fully immersed in a Newtonian fluid. In contrast to previous approaches to coupling fluid particle interacti...

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Bibliographic Details
Published in:Granular matter 2015-08, Vol.17 (4), p.511-521
Main Authors: Bonkinpillewar, Pavan D., Kulkarni, Ajinkya, Panchagnula, Mahesh V., Vedantam, Srikanth
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Belts
Complex Fluids and Microfluidics
Computational fluid dynamics
Drag
Engineering Fluid Dynamics
Engineering Thermodynamics
Fluid dynamics
Fluid flow
Foundations
Geoengineering
Granular materials
Heat and Mass Transfer
Holes
Hydraulics
Industrial Chemistry/Chemical Engineering
Joining
Materials Science
Original Paper
Physics
Physics and Astronomy
Simulation
Slurries
Slurry reactors
Soft and Granular Matter
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Summary:We study two-dimensional flow of a granular slurry in a lid driven cavity using novel coupled fluid–particle discrete element simulations. The particles are assumed to be linearly elastic and fully immersed in a Newtonian fluid. In contrast to previous approaches to coupling fluid particle interactions, the fluid–particle interaction in the present study is modeled purely through Stokes’ drag. This assumption is based on the fluid inertia being small in comparison to particle inertia. Using this model, we study mixing of two initially stratified layers of the granular material in a belt-driven square cavity. We also study the microscopic aspects of the mixing process by monitoring the breakup of representative unit cells. Higher belt velocities are observed to require lower overall energy to achieve a well-mixed state.
ISSN:1434-5021
1434-7636
DOI:10.1007/s10035-015-0572-2