Micro-mechanics of contact erosion

Galindo Torres, Sergio, Scheuermann, Alexander, Williams, David and Muhlhaus, Hans (2014). Micro-mechanics of contact erosion. In: Grant P. Steven, Qing Li and Zhongpu (Leo) Zhang, Advances in Computational Mechanics. 1st Australasian Conference on Computational Mechanics (ACCM2013), Sydney, Australia, (513-518). 3-4 October 2013. doi:10.4028/www.scientific.net/AMM.553.513

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Author Galindo Torres, Sergio
Scheuermann, Alexander
Williams, David
Muhlhaus, Hans
Title of paper Micro-mechanics of contact erosion
Conference name 1st Australasian Conference on Computational Mechanics (ACCM2013)
Conference location Sydney, Australia
Conference dates 3-4 October 2013
Proceedings title Advances in Computational Mechanics   Check publisher's open access policy
Journal name Applied Mechanics and Materials   Check publisher's open access policy
Place of Publication Stafa-Zurich, Switzerland
Publisher Trans Tech Publications
Publication Year 2014
Sub-type Fully published paper
DOI 10.4028/www.scientific.net/AMM.553.513
Open Access Status
ISBN 9783038350682
ISSN 1660-9336
Editor Grant P. Steven
Qing Li
Zhongpu (Leo) Zhang
Volume 553
Start page 513
End page 518
Total pages 6
Language eng
Abstract/Summary In the present paper a simulation framework is presented coupling the mechanics of fluids and solids to study the contact erosion phenomenon. The fluid is represented by the Lattice Boltzmann Method (LBM) and the soil particles are modeled using the Discrete Element Method (DEM). The coupling law considers accurately the momentum transfer between both phases. A soil composed of particles of two distinct sizes is simulated by the DEM and then hydraulically loaded with an LBM fluid. It is observed how the hydraulic gradient compromises the stability of the soil by pushing the smaller particles into the voids between the largest ones. The hydraulic gradient is more pronounced in the areas occupied by the smallest particles due to a reduced constriction size, which at the same time increases the buoyancy acting on them. At the mixing zone, where both particles sizes coexist, the fluid transfers its momentum to the small particles, increasing the erosion rate in the process. The results offer new insights into the erosion and suffusion processes, which could be used to better predict and design structures on hydraulically loaded soils.
Keyword Discrete element method
Lattice Boltzmann method
Contact erosion
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Tue, 01 Apr 2014, 00:13:18 EST by Dr Alexander Scheuermann on behalf of School of Civil Engineering