IMA conference on dense granular flows

Workshop theme

Flows involving solid particulates are ubiquitous in nature and industry alike. Such flows are found in pharmaceutical production, the chemical industry, the food and agricultural industries, energy production and the environment. Many unsolved problems remain, however. For example, the rejection rate by US pharmaceutical manufacturers is around 5% with the cost of losing a single batch of medication ranging from £50,000 to £500,000. In order to be able to solve such problems, granular flows need to be understood so that their behaviour can be controlled and predicted.

To date, we are able to describe rapid granular flows, where the particles are highly agitated and there has been some success describing static systems. The intermediate regime, where these two phases meet and coexist, is not as well understood and yet is the most commonly observed behaviour of granular flow. The objective of this meeting will be to interface the two ends of the particulate flow spectrum – those working to understand the fundamentals of granular flows and those attempting to control particulate flows in an industrial setting - to develop solutions to the complex problems presented by dense granular flow

Invited Speakers

• Bob Behringer (Duke University)
  • Statistics of Dense Granular Materials

• Thomas C. Halsey(ExxonMobil Upstream Research)
  • Motion of frictional grain packings

• Jim Jenkins (Cornell University)
  • Dense Granular Flows Down Inclines
  • Biography: James T. Jenkins is the Walter S. Carpenter, Jr. Professor of Engineering in the Department of Theoretical and Applied Mechanics at Cornell University. His recent research has focused on the formulation of constitutive relations for dense, dissipative, collisional flows; analytical descriptions of debris flows; and the modeling of wind-blown sand.

• Raffaella Ocone (Heriot-Watt University)
  • Investigating the Intermediate Granular Flow Regime
  • Biography: Raffaella Ocone is Professor of Chemical Engineering at Heriot-Watt University, Edinburgh, UK. She received her MEng in Chemical Engineering from the University of Naples, Italy, and MA and PhD from Princeton University, USA. She was elected Fellow of the Royal Society of Edinburgh in 2006 and Cavaliere of the Order of Merit of the Italian Republic in 2007. She is a Chartered Engineer, a Chartered Scientist and a Fellow of the Institution of Chemical Engineers. Her research interests are in modelling complex systems, spanning from the hydrodynamics of solid/gas suspensions, to complex reaction networks. Recent work includes the modelling of biological systems.

• Dr Philippe Rogueda (Novartis)
  • Multiphase flow enigmas in inhalation delivery
  • Biography: Philippe Rogueda is a world expert on formulation science, especially on the formulation of medicinal aerosols. His expert lies in the field of colloid and physical chemistry, in relation to particle engineering and non aqueous formulations.

• Professor Jonathan Seville (Warwick)
  • Granular Flows at the Single Particle Level
  • Biography: Jonathan Seville is Dean of Engineering at the University of Warwick, UK. He holds degrees in Chemical Engineering from the Universities of Cambridge and Surrey and has held visiting appointments at the University of British Columbia and the Technical University of Denmark. He is a Chartered Engineer, a Fellow of the Institution of Chemical Engineers and a Fellow of the Royal Academy of Engineering. His research includes a wide range of solids processing activities, including particle formation, agglomeration, compaction and coating; fluidisation and reactor design; positron emission particle tracking; discrete element method modelling; and supercritical fluid processes.

Posters

• Mathematical Modelling of Dense Granular Flow in Cone Crushers
  • John Billingham, Oliver Bain, Ian Lowndes and Sam Kingman

• Recirculating Inclined Chute at DAMTP, Cambridge
  • Alex Holyoake

• Acoustic Signals of Sand Flowing Down Inclined Slope
  • Danielle Tan, Steve Keast, Prof. Wolfgang Sachse and Prof. Jim Jenkins

• A Constitutive Relation for Dense Suspensions
  • Luigi La Ragione and J.T. Jenkins
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