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01-05 IMA Conference on Dense Granular Flows

Date: Monday 5 - Friday 9 January 2009
Location: Issac Newton Institute, Cambridge

The videos of the talks are now available to view at

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 flows.

Organising Committee

Ricky Wildman, Loughborough University (Chair)
Nico Gray, University of Manchester
Jonathon Huntley, Loughborough University
Jim McElwaine, University of Cambridge
Christine Hrenya, University of Colorado, USA

Invited Speakers

Bob Behringer, Duke University, North Carolina, USA
Statistics of Dense Granular Materials
Abstract: Dense granular materials present a number of interesting challenges. They are many-body systems with dissipative interactions. As suggested by Edwards et al., one would like to have a statistical approach analogous to Boltzmann statistics for energy-conserving systems. But the dissipative character of dense granular materials challenges conventional notions. New approaches require a careful examination, and suggest a number of experiments. This talk will focus on recent experiments that seek to characterize the statistics of dense granular systems and to test recent models. In particular, we have carried out experiments to determine the microscopic distributions of contact forces, the nature of jamming, the effect of stress anisotropy, the role of affine and non-affine motion in sheared granular systems, the effect of particle rotation, and the importance of particle shape. Many of these experiments use photoelastic particles. This allows the tracking of particle motion, and perhaps most importantly, the determination of the contact forces by the solution of a nonlinear inverse problem.

Our results are consistent with predictions from the force ensemble approach, but much more needs to be done.

Thomas C. Halsey,  ExxonMobil Upstream Research, Houston, Texas
Motion of frictional grain packings

Jim Jenkins, Cornell University, USA
Dense Granular Flows Down Inclines
Abstract: We'll show how kinetic theory, slightly extended to include an additional length scale in the rate of collisional dissipation that is associated with clusters and/or correlated collisions, can predict the observed features of inclined flows of inelastic, frictional spheres over a rigid bumpy base in the absence of side walls and over the surface of a heap when side walls are present.

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, Department of Chemical Engineering, 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 FRSC CChem CSci EurIng, Novartis UK
Multiphase flow enigmas in inhalation delivery
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 SevilleProfessor Jonathan Seville, School of Engineering, University of 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.


Monday, 5 January

09.00 - 10.00    Registration
10.00 - 10.20    Welcome by Sir David Wallace and Introduction
10.20 - 11.00    Plenary: Investigating the Intermediate Granular Flow Regime
Raffaella Ocone
11.00 - 11.45    Coffee
11.45 - 12.10    The flow of fluidised particles
Andrew J. Hogg, Mark A. Gilbertson and David E. Jessop
12.10 - 12.35    Bed-load transport by laminar shearing flows
Julien Chauchat, Malika Ouriemi, Pascale Aussillous, Marc Medale
and Elisabeth Guazzelli
12.35 - 13.00    Agitated medium dense slurries in a dead-end filtration geometry
Professor M.A. Koenders and Curt Koenders
13.00 - 14.00    Lunch
14.00 - 14.40     Plenary: Multiphase flow enigmas in inhalation delivery
Dr. Philippe Rogueda
14.40 - 15.05   “Modelling Dosator Performance” Case Study of Solving In Dense Granular Flow
O.A. Angulo, R.J. Berry and M.S.A. Bradley
15.05 - 15.30      Power-law rheology and the growing correlation length at the
jamming transition
Takahiro Hatano
15.30 - 16.10   Coffee
16.10 - 16.35   

Velocity and concentration profiles measurements in
concentrated particle suspensions
Sébastien Wiederseiner, Nicolas Andreini, Christophe Ancey and
Martin Rentschler

17.15 - 18.15  

Opening Reception















Tuesday, 6 January

09.00 - 09.40   Plenary: Statistics of Dense Granular Materials
Bob Behringer
09.40 - 10.05     The modelling of dense, slow granular flow using a new plasticity model
David Harris
10.05 - 10.30    Axisymmetric granular collapse: a transient 3D flow test of
Laurent Lacaze and Rich R. Kerswell
10.30 - 10.55   Percussion of granular material by one grain: Experiment and model
Jérôme Crassous, Djaoued Beladjine and Alexandre Valance
10.55 - 11.20    Washboard Road
Nicolas Taberlet, Jim McElwaine and Stephen W. Morris
11.20 - 11.45   Coffee
11.45 - 12.00   An Exact Solution for a Model of Plasticity for Powder Materials in an
Un-Steady Plane Strain Process
Olga Chesnikova and Alexander Pirumov
12.00 - 12.15   Rapid Granular Chute Flow – Multiple steady flow solutions and
their linear stability
Mark J. Woodhouse and Andrew J. Hogg
12.15 - 12.30   A Comparative Study of Models for Incompressible Granular Materials
Sergei Alexandrov and David Harris
12.30 - 12.45   Granular flows on unconfined slopes
Daisuke Takagi, Jim N. McElwaine and Herbert E. Huppert
12.45 - 13.00   Triggering of submarine granular avalanches
Mickael Pailha, Maxime Nicolas and Olivier Pouliquen
13.00 - 14.00   Lunch
14.00 - 14.25   Impact in a granular medium
Dr Yann Bertho, Antoine Seguin and Philippe Gondret
14.25 - 14.50   Heterogeneities in Granular Dynamics
Professor A. Mehta, G.C. Barker and J.M. Luck
14.50 - 15.15   Prediction of the hydrodynamics of slightly wet suspended particles
Dr. Yassir T. Makkawi
15.15 - 15.40   Modelling and experiments of wet granular flows in rotating drums
Shuiqing Li and J.S. Marshall
15.40 - 16.10   Coffee and Posters
16.10 - 16.35  

Foam as a soft granular material
Vincent Langlois, S. Hutzler and D. Weaire




















Wednesday, 7 January

09.00 - 09.40   Plenary: Motion of frictional grain packings
Thomas C. Halsey
09.40 - 10.05   Volcanic Hazards and Uncertainty: Granular Flow Simulations
and Statistics
E. Bruce Pitman
10.05 - 10.30   Modelling shallow gravity-driven solid-fluid mixtures over
arbitrary Topography
Ioana Luca, Yih-Chin Tai and Chih-Yu Kuo
10.30 - 10.55   Dense granular gases: Can they jam?
N. Rivier
10.55 - 11.20   A multiscale simulation technique for granular flow
Chris H. Rycroft
11.20 - 11.45   Coffee
11.45 - 12.10  

A shear rate dependent critical state theory to describe the initiation
of dense granular flows
Olivier Pouliquen and Mickael Pailha

12.10 - 12.35   Experimental observations of fluid-inertial behaviour of
dam-break, dense granular flows and their relevance for the
propagation of pyroclastic flows
Olivier Roche, S. Montserrat, Y. Niño and A. Tamburrino
12.35 - 13.00   Transition from discontinuous avalanches to continuous flow
Prof. Dr. Philippe Gondret, Raphaël Fischer and Marc Rabaud
13.00 - 14.00   Lunch
14.00 Trip













Thursday, 8 January

09.00 - 09.40   Plenary: Dense Granular Flows Down Inclines
Jim Jenkins
09.40 - 10.05   Rapid Granular Flows: From Kinetic Theory to Granular Dynamics
V. Kumaran
10.05 - 10.30   Modelling of particle size segregation and its applications to
geophysical problems
Anthony Thornton, J.M.N.T. Gray and P. Kokelaar
10.30 - 10.55   Elastic Effects in Granular Flows
Charles S. Campbell
10.55 - 11.30   Coffee
11.30 - 11.45   Pre-avalanche structural rearrangements in granular packing
S. Kiesgen de Richter, G. Le Caër, R. Delannay, P.Richard and V. Zaitsev
11.45 - 12.00   Consequences of the μ(I) constitutive law
C.J. Cawthorn, E.J. Hinch and J.N. McElwaine
12.00 - 12.15   The flow generated by oblique impingement of granular material on
an inclined plane
C.G. Johnson and J.M.N.T. Gray
12.15 - 12.30   Lateral instability of dense granular flows on a rough incline
Tamás Börzsönyi, Robert E. Ecke and Jim N. McElwaine
12.30 - 12.45   Structures Formation by Migration of Particles in Suspension flows
M. Ibrahim, U.Tuzun, A. Skeldon, D.M. Heyes and M.A. Koenders
12.45 - 13.00   Simultaneous measurement of viscosity and kinetic temperature in
a driven dense granular suspension
Sonia May and Matthias Schroeter
13.00 - 14.00   Lunch
14.00 - 14.25   Nuclear Magnetic Resonance studies of an ultrasonically
vibrated granular bed
J.M. Huntley, T. Tarvaz, N.A. Sheikh, R.D. Wildman, A.J. Sederman and
M.D. Mantle
14.25 - 14.50   Particle Segregation in Oscillating Straining Flows
Professor Jeffrey Marshall
14.50 - 15.15  

Can cellular automata based models accurately simulate
granular material flow?
M.A. Wheel and B. Edmans

15.15 - 15.40   Dense Granular Flow: A Review of the Types of Problems,
Approaches to Solutions and Outstanding Opportunities
M.S.A. Bradley and R.J. Farnish
15.40 - 16.10   Coffee
16.10 - 16.35   Sorting out Segregation Mechanisms at the Interface between
Densely Creeping and Energetic Granular Flows
Kimberly Hill and Yi Fan
16.35 - 17.00  

Quasi-gaussian velocity distribution of a vibrated granular
bilayer system
Pascal Viot, Alexis Burdeau, K. Combs and J. Olafsen


Formal Dinner at St. John’s.
























Friday, 9 January 

09.00 - 09.40   Plenary: Granular Flows at the Single Particle Level
Professor Jonathan Seville
09.40 - 10.05   On the role of numerical diffusion on QMOM and DQMOM simulation
of fluidized beds
Luca Mazzei, Daniele L. Marchisio and Paola Lettieri
10.05 - 10.30   Orientational ordering in sheared inelastic dumbbells
Julian Talbot
10.30 - 10.55   Stick slip dynamics in a sheared granular system
A. Petri, A. Baldassarri, F. Dalton, F. Leoni, G. Pontuale and S. Zapperi
10.55 - 11.45 Coffee
11.45 - 12.10   Important Thermodynamic Aspects in the Formulation of Solid-fluid
Debris Flow Models (dense and particle laden)
Kolumban Hutter
12.10 - 12.35   Rheology of Confined Granular Flows: Scale Invariance, Glass
Transition and Friction Weakening
Alexandre Valance, P. Richard, M. Louge and R. Delannay
12.35 - 13.00   A new convection scenario in granulates under geometrical restriction
Frank Rietz and Ralf Stannarius
13.00 - 14.00   Lunch
14.00 - 14.25   Size segregation in granular fluid flows
Michele Larcher and James Thomas Jenkins
14.25 - 14.50   Free shear zones in granular bulk flow
T. Unger, A. Ries, J. Kertesz and D.E. Wolf
14.50 - 15.15   Shock Waves and Snow Avalanches
X. Cui and J.M.N.T. Gray
15.15 - 15.40   The Spatiotemporal Dynamics of Segregation-Band Drift in
Particle- Laden Rimming Flow
Peter J. Thomas and Estelle Guyez
15.40 - 16.10  

Coffee and Close















Posters (during Tuesday afternoon coffee break)

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

Conference Fees

Conference fees include lunch and refreshments on 5 - 9 January 2009 and the welcome reception.

Non IMA Member: £410.00
IMA Member: £340.00
Student: £200.00


Please note that the conference dinner is NOT included in the conference fee and that you will need to pay for this separately if you wish to attend.

Conference Dinner £45.00 (per person).


Support is now available for researchers in the following categories:

Researchers from US institutions

Researchers from institutions from developing countries

Participants from the INI programme Granular and Particle Laden Flows, 2003

Early career researchers (PhD students and up to 5 years postdoctoral experience)

If you require support, please include your request with your submission or contact the conference chair, Ricky Wildman (