Flow Aids

Flow aid devices; when to use them and how to use them. Lecture 6 in our main solids flow series.

About this Course

The basics of solids flow

Lecture 6

In Lecture 6, Flow Aid Devices, Joe Marinelli of Solids Handling Technologies explores the area of flow aid devices that can be used to enhance or encourage flow from bins and hoppers.  Although our lecture series concentrates on primarily using gravity to pull material from bins and hoppers, sometimes gravity needs help.  Flow aids are intended to assist gravity by overcoming arching and ratholing problems.

Topics covered in this lecture include vibratory type devices such as bin dischargers and vibrators along with those that agitate product.  As well, forced extraction equipment such as silo bottom reclaimers and fluidization is discussed along with the availability of flow aid additives and chemicals.


Joe describes the equipment available within each of these categories and provides insight as to whether the devices discussed are practical, reliable and more importantly effective.  This lecture will ensure that if flow aids are warranted, you will make the correct decision in purchasing and installing them.

 The online video 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, www.powderbulksolids.com





Forced Extraction


Flow Aid Materials & Chemicals

Letdown Chutes


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