Simulation of Particle Suspensions Using a Coupled Lattice Boltzmann and Discrete Element Method

Jones, Bruce, Williams, John and Leonardi, Chris (2015). Simulation of Particle Suspensions Using a Coupled Lattice Boltzmann and Discrete Element Method. In: 49th US Rock Mechanics / Geomechanics Symposium 2015. US Rock Mechanics/Geomechanics Symposium, San Francisco, CA, United States, (2307-2311). 29 June - 1 July 2015.

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Name Description MIMEType Size Downloads
Author Jones, Bruce
Williams, John
Leonardi, Chris
Title of paper Simulation of Particle Suspensions Using a Coupled Lattice Boltzmann and Discrete Element Method
Conference name US Rock Mechanics/Geomechanics Symposium
Conference location San Francisco, CA, United States
Conference dates 29 June - 1 July 2015
Convener American Rock Mechanics Association
Proceedings title 49th US Rock Mechanics / Geomechanics Symposium 2015
Place of Publication Alexandria, VA, United States
Publisher The American Rock Mechanics Association
Publication Year 2015
Sub-type Fully published paper
ISBN 9781510810518
Volume 3
Start page 2307
End page 2311
Total pages 5
Language eng
Abstract/Summary Using a coupled lattice Boltzmann and discrete element method, we have developed a new tool for the numerical characterisation of dense suspension rheology. This approach has been implemented using a shared memory, multicore, parallel architecture which allows for rapid and inexpensive evaluation of model results. Where model capabilities include non-Newtonian rheology, turbulence, fluid-solid interactions, and lubricated solid-solid interactions. Through consideration of the fundamental phenomena of flow and contact mechanics this model is able to accurately capture the suspension rheology. Using this coupled framework we have implemented a numerical couette flow rheometer, discrete element particles are packed into a cubic lattice Boltzmann domain which is periodic in the lateral directions. Using either stress or shear rate control, this model then simulates the shearing of the particulate suspension. The resultant hydrodynamic and mechanical forces on the shearing plane are recovered once the model has achieved a steady state, where these results are used to compute an effective suspension viscosity. The results from this analysis have been validated against existing semi-empirical expressions.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Wed, 11 May 2016, 15:26:22 EST by Anthony Yeates on behalf of Learning and Research Services (UQ Library)