Design Principles for Reliable Flow

Ensuring reliable flow from your bins, hoppers, and feeders. Lecture 2 in our solids flow series.

About this Course

The basics of solids flow

Lecture 2

This lecture will further develop the topics of flow problems, their effects, and flow patterns discussed during the previous course, "Flow Problems, Their Effects, and Flow Patterns." The design principles required to ensure reliable flow from your bins, hoppers, and feeders will be covered extensively.

Topics covered in this lecture include the ASTM standard for measuring bulk solids flow properties, using the Jenike Shear Tester.  This device allows the user to determine material wall friction properties as well as its cohesive strength.  Wall friction tests yielding the angle of wall friction, leads to determination of hopper angles required to ensure flow along the walls, which is mass flow.


Additionally, measurement of a bulk solid’s cohesive strength is illustrated.  Once your material’s cohesive strength is determined, you will learn how to calculate hopper opening sizes required to prevent arching.

 This one hour video online class is given along with handouts of the presentation and a quiz that will help to ensure your complete understanding of the concepts. Upon purchase of the course you will have 3 days to view the course before your access expires.


Design Principles for Reliable Flow


  • Introduction
  • Slide Handout
  • Lecture
  • Quiz

About Your Instructor

Joe Marinelli

Joe Marinelli

Senior Consultant

Joseph Marinelli, the founder of Solids Handling Technologies, Inc. in Rock Hill, SC is a bulk materials handling expert who has taught hundreds of highly acclaimed engineering seminars.  Since 1972, he has been active in testing bulk solids and consulting on materials handling systems design.  With Jenike & Johanson, Inc., world-renowned experts on solids handling, Mr. Marinelli received his Bachelor of Science degree in Mechanical Engineering, from Northeastern University in Boston, MA.

Mr. Marinelli has also worked for manufacturers of solids handling equipment, such as feeders and silos.  This background provides a unique blend of consulting and manufacturing experience to solve solids flow problems.

He lectures frequently, teaching courses on solids flow principles and flow property testing, and has authored several papers and an encyclopedia section on the subject.  Since 1997, he has been involved with very popular seminars at the University of Wisconsin in the areas of bin and feeder design and solids flow property testing.  He is also a columnist (“Powder Perspectives”) for the website,


Flow Properties

Jenike Shear Tester

Cohesive Strength

Wall Friction

Silo Pressure Distributions

Flow/No Flow Criteria


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