DEM

The aim is to develop a new understanding of the micromechanics of railway trackbed subjected to dynamic loads induced by high speed trains. This should lead to safer design of high-speed railway systems which require less maintenance and, therefore, are more sustainable.

Research Themes: 

  • Granular Mechanics and Industrial Infrastructure
DEM simulation of experimental trackbed at Zhejiang University

For granular materials with low thermal conductivity heat transfer occurs through interstitial gases as well as through physical contacts.  Existing particle based models are ill suited to dense systems so a multi-scale approach has been used to correlate the local packing structure to the gas contribution to conductive heat transfer in dense granular systems.

Research Themes: 

  • Granular Mechanics and Industrial Infrastructure
Conductive heat transfer through stagnant gas and solid in a random packing.

The principal aim is to characterise the flow properties of dense granular systems. In particular, the influence of different particle-shape representation techniques in the Discrete Element Method (DEM) is assessed. Additionally, experiments in a silo centrifuge device to determine the bulk response of granular assemblies under realistic stress states are being carried out. This work is part of T-MAPPP (Training in Multiscale Analysis of multi-Phase Particulate Processes), an FP7 Marie Curie Initial Training Network (https://www.t-mappp.eu).

Research Themes: 

  • Granular Mechanics and Industrial Infrastructure
Influence of including rolling resistance on flow profiles of spherical particles.

Mud, slurry, coffee, paints, cements, batteries and many other everyday materials have particles suspended in a liquid. We need to understand the flow behaviour to handle, and process such materials for traditional and innovative applications. Our research seeks to understand the common features of the flow behaviour of different materials using simple particle based simulations. In particular, we focus on dense suspensions where the particles occupy more than 50 % by volume of the solution.

Research Themes: 

  • Granular Mechanics and Industrial Infrastructure
DEM simulation of shear flow of particle suspension

To enlarge the scale of discrete element modelled particulate system from spherical to nonspherical; to increase the computational efficiency of simulating the nonspherical system; to provide more insights of particulate solid mechanics in engineering applications.

Research Themes: 

  • Granular Mechanics and Industrial Infrastructure

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