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Details of Grant 

EPSRC Reference: EP/D030676/1
Title: Mixing and segregation in polydisperse granular flows
Principal Investigator: Wildman, Professor RD
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Sch of Mechanical and Manufacturing Eng
Organisation: Loughborough University
Scheme: Standard Research (Pre-FEC)
Starts: 11 October 2005 Ends: 10 April 2006 Value (£): 45,161
EPSRC Research Topic Classifications:
Multiphase Flow Particle Technology
Rheology
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
One only has to walk through a supermarket to understand the role that powders play in our lives. From foodstuffs, to washing powders, to pharmaceuticals, powders are commonplace and are often produced as an intermediate stage between manufacture of the product and its use. By formulating a powder, or granular material, the manufacturer is able to transport and store their product in an efficient way. The beauty of granular materials is that they show evidence of being both liquid and solid like. If one places granular particles in a container, the behaviour is similar to a solid, but if one agitates the particles the granular bed shows behaviour similar to the everyday liquids we are all used to. We have now reached the point where we understand (relatively well) how very simple systems behave. An example of this is a system consisting of one size of particles being shaken in a container. However, when we introduce different sizes of particles into this flow we rapidly find that our predictions become inaccurate. Our proposed research aims to understand this more complex regime by performing a set of experiments, numerical simulations (modelling the motion of individual particles) and continuum theory (modelling of the whole system in terms of the average speed and energy of the particles). This approach will allow us to develop an understanding of the mathematical relationships that govern particle motion in a polydisperse system, providing us, and others in the community, with the opportunity to develop tools that can be used to predict powder and granular motion in such a way that we can control the many industrial processes that involve granular materials.
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Organisation Website: http://www.lboro.ac.uk