ERPT Tutorials
Problems in Particulate Flow
by Lyn Bates (Ajax Equipment Ltd.)
-- Part A: Flow Regimes
992Q-Bates,
Hopper Flow (Laboratory Demonstrations)
Funnel Flow, Mass Flow, Particle Dilation, Consolidation Effect
of Powder Flow, Segregation during Hopper Flow,
Flow improvement Due to Powder Agglomeration, Wall Friction
by Simon M. Iveson and George V. Franks (Univ of Newcastle)
-- ERPT 051Q-IvFr
Web Tutorials (not ERPT)
Design and Problems of Chutes and Feeders
The Jenike & Johanson Co. site has several publications:
--
www.jenike.com/pages/education/papers/papers.html
Granular Flow
by Sebastien Dartevelle (Univ. of Michigan)
an extensive Web site called
The Granular Volcano Group.
The tutorial on granular flow is at
www.granular.org/granular_medium.html, with sections on
I. Introduction
II. Concentrated Flow
III. General Case: Multiphase flow
IV. The Problem of Granular Pressure
1. General Overview of Gas Kinetics
2. General Overview of Granular kinetics
A somewhat more advanced discussion is given at
www.granular.org/granular_theory.html, with sections on
I. Introduction
II. Frictional Stress Formulation
III. Kinetic-Collisional Stress Formulation
1. Introduction
2. Granular kinetic Theory Facts: Granular Pressure and Granular Viscosity
3. Conservation of the Granular Temperature (or the Granular Fluctuating Energy)
4. Kinetic-collisional Stress Tensor
IV. Total Stress Tensor
V. Practical Application to Granular Flow: Grain concentration and Grain-size effect
Flow properties and Silo Design
by Dr.-Ing. Dietmar Schulze
Flow properties of powders and bulk solids and silo design for flow /
Fließeigenschaften von Schüttgütern und verfahrenstechnische Siloauslegung (PDF file)
--
www.dietmar-schulze.de/info1e.html (English) /
www.dietmar-schulze.de/info1.html (Deutsch)
Web Sites of Educational Interest
Hopper Flow:
by Lyn Bates (Ajax Equipment Limited)
Condensed guides to industrial powder handling:
---
Ten Key Steps for Achieving Reliable Flow from Hoppers
---
The Flow Commandments (a humorous article)
---
Top Ten Tips For Reliable Flow From Hoppers,
by Lyn Bates, Shrikant Dhodapkar, and George Klinzing
--- Top Ten Tips To Prevent and Resolve Segregation Problems,
by Lyn Bates, Shrikant Dhodapkar, and George Klinzing
Hopper Flow:
Jenike and Johanson has posted a number of
case studies
of industrial processing problems involving particles. They offer
courses
and have posted a few on-line videos of particle flow concepts:
arching (Shockwave video)
ratholing (Shockwave video)
sifting segregation [QuickTime]
flooding [QuickTime]
Screw Conveying:
by Lyn Bates (Ajax Equipment Limited)
Condensed guides to industrial powder handling:
---
Ten Key Steps to avoid Screw Feeder Discharge
---
Ten Key Steps for Reliable Screw Conveyor Performance
---
Top Ten Tips To Avoid Screw Feeder Discharge Problems,
by Lyn Bates, Shrikant Dhodapkar, and George Klinzing
Bouncing Bed
by the Caltech Granular Flows Group
a video clip of a bouncing bed of particles
--
www.cco.caltech.edu/~granflow/homepage.html
Bin Discharge Control: Matcon
has nicely illustrated product brochures that show a variety of methods
for controlling the flow of tablets and friable (easy-to-break) particles
as well as application sheets the describe specific cases of use.
The site states "the cone valve - invented, patented and developed by Matcon
... solves all the typical flow problems - bridging, blockages,
segregation, flushing, core-flow."
You may request a solids handling CDROM from them.
Non-Web Resources
The Design of Hoppers for Strength and Flow -- see short courses
by Glasgow Caledonian Univ's Centre for Industrial Bulk Solids Handling
-- see ERPT's list of non-Web resources
Feeding Technology for Plastic Processing, by David H. Wilson
(Hanser / Gardner Pub., Cincinnati, 1998) ISBN 1-56990-241-0
-- This has much helpful information on feeding solids to industrial processes
[SD]
