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discrete element method

Numerical Simulation of Particle Stress and Fracture using FEMDEM: Application to Process Catalysts

Supervision:
Dr JP Latham, Dr Jiansheng Xiang
Industry Contacts:
Principal Investigator - Dr Michele Marigo
Co-investigators - Dr Mikael Carlsson, Prof Hugh Stitt

Applications are invited for a PhD studentship to join AMCG (Applied Modelling and Computational Group) in the Department of Earth Science & Engineering.

MARIE CURIE FELLOWSHIP - Early Stage Researcher

Are you a recent graduate in civil, mechanical or chemical engineering, physics
or applied mathematics, with experience in one or more of the following: solid
or soil/granular mechanics, discrete element method (DEM), bulk solids handling,
computational multiphase flow modelling?
Looking to develop a career in cutting-edge engineering with the opportunity to
live and work internationally?
The PARDEM project has brought together industrial and academic partners to
develop the DEM modelling techniques and to predict the behaviour of granular
solids such as pellets, grains, sand and biomass for industrial applications.
As part of PARDEM, the University of Edinburgh has outstanding doctoral training
opportunities in the area of granular solids. We are seeking an exceptional

WaiChing Sun's picture

Shape of particles in DEM

Many granular materials encountered in engineering practice are of irregular shapes that are not essentially smooth or rounded. However, in DEM, grains are idealized as spheres and ellipsoids and their surface are assumed to be sufficiently smooth. As a result, I wonder why there is no model of  irregular shapes and what is the difficulty on implementing such a model? Is there any recent work aimed to simulate grains of irregular shape? Thanks a lot. 

the DEM's solutions for static mechanics seem strange

My own DEM(Discrete Element Method) program's solution for static problem seems strange.

I use my program to calculate the displacement of a cantilever under static pressure:

1. it seems my program shows convergence for static problem as the mesh gets denser. As the mesh grows denser(that means the particle becomes smaller), the displacement(of y direction)  of the free tip becomes smaller.

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