Preliminary Program


12-17 May 1996
Davos, Switzerland

Conference Chairs:

Graham Wallis
Thayer School of Engineering
Dartmouth College

Gad Hetsroni
Israel Institute of Technology

American Institute of Chemical Engineers
American Society of Mechanical Engineers
British Petroleum plc
Fluent, Inc.
Velmet Co.

Engineering Foundation Conferences
345 E. 47th Street New York, NY 10017
212-705-7836; Fax: 212-705-7441; E-mail:
World Wide Web:


Clayton Crowe
Washington State University

Lucia Liljegren
Battelle Pacific NW Laboratory

Reg Davies

Philip Hsieh
Alcoa Technical Center

Harri Kytomaa
Failure Analysis Associates

Peter Runstadler
Fluent, Inc.

John G. Grace
University of British Columbia

John Yates
University College London

Yutaka Tsuji
Osaka University


The principal goal of this conference, the fourth in a series at roughly three-year intervals, is to provide an informal forum for open discussion of current and novel ideas and findings on Fluid-Particle Interactions. The meeting will be held remote from the distraction of daily business in the congenial surroundings of the Swiss Alps.

Particulate flows continue to challenge industry and are central to numerous natural processes. As the subjects is inherently multidisciplinary, the meeting will draw from numerous disciplines that deal with particulate processes: biological, environmental, physics, mechanical, chemical, civil engineering, geophysics, etc. In addition, the success of this meeting will depend on attracting a strong representation from people who practice the use of liquid-solid and gas-solid mixtures in their daily business, namely the petroleum, mining, materials processing and manufacturing industries.

A major purpose is to both clarify the present state of the art and extend the frontiers of the subject by fostering a free and informal exchange of ideas. To this end, participants will be encouraged to present up-to-date information on the latest developments, to provoke suggestions concerning underlying theories, and suggest possible methods of achieving progress.

A particular objective is to provide an opportunity for representatives from industry to present important practical problems before an audience representing some of the best academic expertise in the field.

There will be special emphasis on ability to make practical prediction, the available methods (including CFD), and sources of error or uncertainty.

Some questions to be addressed are:
a. What are the important applications (in industry, environment, health etc.)?
b. What tools and methods are available for making predictions and design decisions? What phenomena need to be modeled? Have there been major recent developments?
c. How do these predictions compare with measurements? What are the current limits of reliable prediction? Can the relevant measurements be made? How?
d. CFD will inevitably be used more and more. When and how can it help or mislead? How sensitive are predictions to the "physics" in the code? Is the base for CFD to be a general framework or a hodge- podge of recipes, or some combination?

There will also be opportunities to present new theoretical or experimental approaches, especially those with potential for broad application.

Sunday, 12 May 1996

16:00 - 18:30
Registration (Lobby of Cresta Sun Hotel)

18:30 - 20:30

20:30 - 22:00
Opening Reception

Monday, 13 May 1996

07:00 - 08:30

08:30 - 08:50

Graham Wallis
Gad Hetsroni
Barbara Hickernell
Herman Bieber

08:50 - 12:00
Industrial Applications 1

Phil Hsieh
Alcoa, USA

08:50 - 09:30
Keynote: Reg Davis
Dupont Co. USA
Particle processing - From Folklore to Factory to Finance

09:30 - 09:50
D. Kunii and O. Levenspiel
Oregon State University, USA
The Development of Reactor Model for CFB

09:50 - 10:10
D. Mason and A. Levy
Glasgow Caledonia University, United Kingdom
The Cost of Designing Gas-Solids Transport Systems Using 1D or 3D Models

10:10 - 10:40
Coffee Break

10:40 - 11:00
D. Newton and N. Hird
BP Chemicals LTD, United Kingdom
Assessment of FCC Catalyst Evaluation Criteria

11:00 - 11:20
P. Sarkomaa and S. Ruottu
Lappeenranta University of Technology, Finland
The Opening Pressure of Round Primary-Gas Nozzle

11:20 - 11:40
S. Vaccaro, D. Musmara and M. Petrecca
University of Napoli, Italy
Evaluation of Jet Penetration Depth in Fluidized Beds by Pressure Signal Analysis

11:40 - 12:00
M. Vanni, M. Sommerfeld, and G. Baldi
Politecnico di Torino, Italy
Improvement of Aggregation Processes for the Growth of Solid Particles Through Controlled Break-up

12:00 - 13:30

14:00 - 16:20
Industrial Applications 2

Chair: Reg Davies
DuPont Co., USA

14:00 - 14:40
: Lothar Reh
ETH, Zurich, Switzerland
Some Basic Remarks to Fluid Dynamics of CFB-reactors

14:40 - 15:00
A. Lancia, D. Musmara and F. Pepe
University of Napoli, Italy
A Diffusive Model of the Interaction between Limestone Particles and Acid Solutions

15:00 - 15:20
R. Nicolai and L. Reh
Swiss Federal Institute of Technology, Switzerland
Experimental Investigations of Cold-Model CFB Fluid Dynamics

15:20 - 15:40
Coffee Break

15:40 - 16:00
H. Pendse
University of Maine, USA
On Applications of Ultrasonic Spectroscopy and Dielectric Spectroscopy for Characterization of Colloidal Suspensions

16:00 - 16:20
R. Chirone and P. Russo
Universita di Napoli Federico II, Italy
Role of the Frequency Field in Solid Emissions Beds

16:20 - 16:30

18:00 - 19:30

19:30 - 22:00
Industrial Applications 2 (continued)
Chair: Reg Davies
DuPont Co., USA

19:30 - 19:50
C. Alimonti and F. C. Caetani
Universita Degli Studi Di Roma " La Sapienza", Roma
Mud Filtration During Drilling: A Modelling Approach

19:50 - 20:10
A. Kmiec and Z. Mindziul
Technical University of Wroclaw, Poland
Analysis of Gas-Solid Flow in a Riser Reactor

20:10 - 20:30
M. Olazar, M.J. San Jose, B. Gaisan, R. Aguado and
J. Bilbao
Universidad Del Pais Vasco, Spain
Bed Voidage-Gas Velocity Relationship in Dilute Conical Spouted Bed

20:30 - 20:50
S. Erol Uluq
Middle East Technical University, Turkey
Analysis of Backwashing in Rapid Filters by Flow Visualization

20:50 - 21:10
T. Kojima, C-H Luo, and S. Uemlya
Seikei University, Japan
Dynamic Characteristics of a Jetting Fluidized Bed

Cash Bar (Cresta Sun)

Tuesday, 14 May 1996

07:00 - 08:30

08:30 - 11:30
Other Applications

Chair: Lucia Liljegren
Battelle Pacific, Richland WA, USA

08:30 - 09:10
Keynote: David Newton
BP Chemical, UK
Problems and Challenges in Industrial Fluidized Bed Processes

09:10 - 09:30
P. Gauer
Swiss Federal Institute for Snow and Avalanche Research, Switzerland
Blowing and Drifting Snow

09:30 - 09:50
F. Hermann and D. Issler
Swiss Federal Institute for Snow and Avalanche Research, Switzerland
Snow Entrainment and Sedimentation in Powder Snow Avalanches

09:50 - 10:10
T. Scheuerman, A. Camper, M. Hamilton, P. Stoodley and E. Visser
Center for Biofilm Engineering, USA
Effect of Substratum Topography on Bacterial Adhesion

10:10 - 10:40
Coffee Break

10:40 - 11:00
Z. Zhang and C. Thomas
BBSRC Centre for Biochemical Engineering, United Kingdom
Using Eddy Number Distribution in Turbulent Flows to Describe Direct Cell-Eddy Interactions

11:00 - 11:20
Gh. Juncu
Politehnica University Bucharest, Romania
The Influence of the Physical Properties Ratios on the Conjugate Heat Transfer from a Droplet

11:20 - 11:40
L. Yan and Y. Guangxi
Tsinghua University of China
The Experimental Investigation on a Loop Seal of a CFB

11:40 - 12:00
R.L. Sonolikar, S.B. Gaidhani and S. Pentu Saheb
Laxminarayan Institute of Technology, India
Segregation of MultiComponent System Containing a Magnetic Component in a Magnetically Stabilized Fluidized Bed

12:00 - 13:30

13:30 - 17:00
Ad hoc discussions/free time

17:00 - 20:00
Phenomena and Fundamental: 1
Chair: Graham Wallis
Dartmouth College, Hanover NH, USA

17:00 - 17:40
Keynote: John Yates
University College, London, England
Title to be announced

17:40 - 18:00
Y. Buyevich and S. K. Kapbasov
NASA, Ames Research Center, USA
A Heuristic Model of Fluctuations in Vertical Fine Suspension Flow

18:00 - 18:20
S. Brandani, S. Rapagna, P.U. Foscolo, and L.G. Gibilaro
University of L'Aquila, Italy
Jump Conditions for one-Dimensional Two-Phase Shock Waves in Fluidized Beds: The Effect of The Jump in Fluid Pressure

18:20 - 18:40
Z. Chen, L.G. Gibilaro, P.U. Foscolo
University of L'Aquila, Italy
Fluid Pressure Loss in Slugging Fluidized Beds

18:40 - 19:00
K.L. Ostrowski and R.A. Williams
Camborne School of Mines, University of Exeter, United Kingdom
Two-Dimensional Model of Bubble Flow Stability

19:00 - 19:20
Y. Sergeev
University of Newcastle, England
Predictive Model of Solid Clusters in Fluidized Bed Riser Flow: Mean Cluster Size

19:20 - 19:40
A. Kantzas
TIPM Laboratory, University of Calgary, Canada
Predictions on Bubble and Solids Movement in Laboratory Polyethylene Fluid Beds as Visualized by X- ray Computer Assisted Tomography (CAT) Scan

19:40 - 20:00
H. Vural and M. Koksal
Middle East Technical University, Turkey
Bubble Size Control Using Moving Double Plate Distribution

20:15 - 21:45

Cash Bar (Cresta Sun)

Wednesday, 15 May 1996

07:00 - 08:30

08:30 - 11:00
Phenomena and Fundamentals: 2

Chair: Anders Dahlkild
Royal Institute of Technology, Stockholm, Sweden

08:30 - 09:10
Keynote: Olivier Simonin
EDF, France
Recent Advances in the Modelling of Particle-Particle Collision Influence on Fluid-Particle Interaction in Turbulent Gas-Solid Flows

09:10 - 09:30
R. Di Felice
Universita Degli Studi, Italy
The Sedimentation Velocity of Dilute Suspensions of Spheres

09:30 - 09:50
Y. Zimmels
Technion, Israel
On the Diffusive Buoyancy Force and Concentration Dependent Diffusivities

09:50 - 10:10
E.G.D. Cohen, R. Verberg and I.M. de Schepper
The Rockefeller University, USA
LES of Particle-Laden Turbulent Channel Flow Considering Inter-Particle Collision

10:10 - 10:30
V. Yamamoto and M. Potthoff
Osaka University, Japan
LES of Particle-Laden Turbulent Channel Flow Considering Inter-Particle Collision

Lunch (Boxed lunches provided)


18:30 - 19:50
Phenomena and Fundamentals: 2 (continued)

Chair: Anders Dahlkild
Royal Institute of Technology, Stockholm, Sweden

18:30 - 16:50
P. Sarkomaa and A. Rautiainen
Lappeenranta University of Technology, Finland
Drag in Upward, Vertical Dilute Phase Gas-Solid Flow

16:50 - 19:10
P. Doron, M. Simkhis and D. Barnea
Solar Research Facilities Unit, Israel
Flow of Solid-Liquid Mixtures in Inclined Pipes

19:10 - 19:30
M.A. Gilbertson and J.G. Yates
University College, London, England
On the Non-Liquidlike Behavior of Fluidized Beds

19:30 - 19:50
S. Martinussen, M. Wada and S. deSilva
Telemark Technological Research and Development Centre, Norway
Surface Gravity Waves on Fluidized Powders

20:00 - 21:30

Cash Bar (Cresta Sun)

Thursday, 16 May 1996

07:00 - 08:30

08:30 - 11:00
Phenomena and Fundamental: 3

Chair: Michel Lance,
Ecole Central de Lyon, France

08:30 - 09:10
Keynote: Gad Hetsroni
Technion, Israel
Particles-Turbulence Interaction

09:10 - 09:30
J. Brady
California Institute of Technology, USA
Modeling Suspension Flows

09:30 - 09:50
I. Eames and J.C. R. Hunt
DAMTP, Cambridge University, England
Darwin's Concept of Drift, and its Applications to Selected Problems in Multiphase Flow

09:50 - 10:10
J. Wells
Tokyo Institute of Technology, Japan
Calculating Impulse of Image Vorticity. Forces on Particles Near a Vortex

10:10 - 10:40
Coffee Break

10:40 - 11:00 S. G. Yiantsios and A. J. Karabelas
Aristotle University of Thessaloniki, Greece
The Effect of Gravity on the Deposition of Micron-sized Particles on Smooth Surfaces

11:00 - 11:20
Y. Molodtsof
Universite de Compiegne, France
Theoretical Analysis of Flow Regimes and Flow Structure in the Riser of a CFB

11:20 - 11:40
L. Liljegren
Pacific Northwest Laboratory, USA
A Comment on Modeling Particles as Point Forces in Gas-Particle Flows

12:00 - 13:30

13:30 - 15:30
Ad hoc sessions/free time

15:30 - 19:30
Numerical Methods: CFD

Chair: Peter Runstadler
Fluent Inc. Lebanon NH, USA

15:30 - 16:10
Keynote: Clayton Crowe
Washington State University, USA
Topic to be announced

16:10 - 16:30
A. Willemse, J. Gerla, G. Segal and B. Scarlett
TU Delft University of Technology, The Netherlands
Numerical Simulation of the Flow Pattern in Process Equipment

16:30 - 16:50
A. Masselot and B. Chopard
C.U.I. University Geneva, Switzerland
Massively Parallel Simulation of Snow Transport by Wind

16:50 - 17:10
Z. Ulbert, J. Szepvolgy, J. Gyenis and Y. Tsuji
Hungarian Academy of Sciences, Hungary
Effects of Conveying Gas on the Particle Motion in Tubes Equipped with Simple Static Mixer Elements

17:10 - 17:30
C.W.M. van der Geld and J.J. Essing
Eindhoven University of Technology, The Netherlands
On the Importance of Various Forces on Spherical Particles Accelerated in Airflow Near a Cylinder

17:30 - 17:50
S. Jain and P. J. Smith
Fluent Incorporated, USA
Turbulent Particle Dispersion Modeling: Particle Cloud Tracking Approach

17:50 - 18:10
S. Saberi and K. Shakourzadeh
Universite de Technologie de Compiegne, France
Boundary Conditions for Gas-Solid Flow Modelling

18:10 - 18:30
D. Swailes and M. Reeks

Newcastle University, United Kingdom
Dispersion from a Continuous Point Source: The Effect of Crossing-Trajectories in a Simple Shear

18:30 - 18:50
D. Hanes
University of Florida, USA
Measurements of Suspended Particle Concentration and Size Using Multi-Frequency Acoustic Backscatter

18:50 - 19:10
B. Hoomans
Twente University of Technology, The Netherlands
Discrete Particle Simulation of a Dense Two- Dimensional Gas-Fluidized Bed: A Hard Sphere Approach

19:10 - 19:30
Y-L Lu Chen, T-M Yang and J-R Maa
National Cheng Kung University, Taiwan
Surfactant Effects on the Motion of a Droplet in Thermocapillary Migration

Conference Banquet

Friday, 17 May 1996

07:00 - 08:30

08:30 - 11:30
Practical Prediction Schemes

Chair: Dvora Barnea
Tel Aviv University, Israel

08:30 - 09:20
Keynote: Ferit Boysan
Fluent Inc. United Kingdom
Topic to be announced

09:20 - 12:00
Review of the week.
How well are research results and computational methods meeting engineering needs? What needs to be done? Are there new methods that are promising or are being adopted?

10:00 - 10:30
Coffee Break

Lunch and Departure
(boxed lunches will be available)

Numerous activities are available to promote interactions between attendees. Hiking on the nearby trails has typically been the most popular, and an effective catalyst for good discussions. A bus tour will be arranged for Wednesday, May 15. There will be a social hour after dinner each day.

Posters describing work which will not be presented orally will be on display in or near the meeting hall throughout the conference. Titles received thus far include:

An Insight into Composition, Structure and Size of Neutral Particles from a Swiss Karstic Aquifer
O. Atteia
Centre of Hydrogeology, Switzerland

Three Phase Flow Horizontal, Vertical and Inclined Conveyance
J.A. Bamberger
Pacific Northwest National Laboratory, USA

Instrumentation to Measure Physical and Rheological Properties of Radioactive Waste Slurries and Sludges Stored in Million Gallon Tanks
J.A. Bamberger
Pacific Northwest National Laboratory, USA

Developing Jet Mixing Specifications for Particulate Laden Suspensions in 3785M2 Double-Shell Tanks
J.A. Bamberger
Pacific Northwest National Laboratory, USA

Impact of Random Fluctuations on Fluidized Bed Behavior
Y. Buyevich and S.K. Kapbasov
NASA, Ames Research Center, USA

Particle Stratification in Circulating Fluidized Beds
C. Coronella
University of Nevada, USA

The Effect of Hydrodynamic Trauma on the Breakup of Microbial Flocs
S. Illing
University of Cape Town, South Africa

A New Drag Coefficient Equation for Particle Motion in Fluid in the 0áReá107 Region
C. Jia
Shanghai Pharmaceutical Industry Design Institute, China

Effect of Geometry on Solids Suspension in a Stirred Tank
S. Kresta
University of Alberta, Canada

Solids Segregation During Operation of Mixer Pumps
L. Liljegren
Battelle Pacific, USA

Theoretical Analysis of the Behavior of Particle Mixes in the Similar Profiles Regime of a Vertically Flowing Gas-Solids Suspension
Y. Molodtsof
Universite de Compiegne, France

The Forecasting of Internal Structure of Activated Carbons Produced from Carbonaceous Materials
V.M. Ortyk
Gas Institute of National Academy, Ukraine

Characterization of Fabric Filter for Reverse Pulse Jet Cleaning
B. Pitchumani
Particle Science and Technology Laboratory, New Delhi

Simulation of Turbulent Gas-Solid Flows Applied to Fluidized Beds
E. Pelrano
Chalmers University of Technology, Sweden

Ecological and Energy Advantages of Implementing Heterogeneous Process Using Magnetically Structured Layers
T. Popova
University of Chemical Technology and Metallurgy, Bulgaria

The Velocity of Sound in Suspensions
U. Riebel
Technical University Cottbus LS mech Verfahrenstechnik, Germany

Velocity, Flux and Concentration of Refluxing Particles Above a Bubbling Gas-Fluidized Bed
P. Walsh
Sandia National Laboratory, USA

Experimental Description of the Entrance Region of a Riser-Fluidized Bed
H. Weinstein
City University of New York

Modelling of Animal Cell Disruption by Mixed Elongational and Shear Flows
Z. Zhang, C. Thomas and S.R. Otto
BBSRC Centre for Biochemical Engineering, United Kingdom

Application of Composite Energy Density for Stability Analysis of Composite Phase in Magnetized Fluidized Beds
Y. Zimmels
Technion, Israel