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When I became an adjunct professor at the University of Rhode Island, I realized that most books on the subject of bulk solids testing and hopper design were either very terse or rather intense for readers who did not have a mechanical engineering background. My students encouraged me to convert my course material into a text book. Yes, some of the text may have been taken from my prior publications, but I figure that it isn’t plagiarism when you copy your own material. I only disclose design methods that are available in the open literature.
A few of the formulas I derived on my own, but they were all based on fundamental engineering principles. Consequently, some of the analyses that I present may be slightly different than what you might find published elsewhere, but I use them when I consult.
The paperback is 200 pages long and includes sections on analysis of stress, stresses in hoppers, flow property testing, bin design, feeders and flow aids, chute design, and design of process vessels.
The publisher charged me $5.00 per book, but the catch was I had to purchase one hundred of them! So I'm offering them on my website for $20.00, which includes USPS media rate snail mail shipping, with the hope that I will sell enough to be able to provide them for free to my students. I figure that if I'm charitable, I won't get into too much trouble for helping myself to some images from the web without permission.
You can pay me by credit card or PayPal. Please send an email to firstname.lastname@example.org when you place an order if you have questions about international delivery options.
Thank you for your business!
You can download the Excel workbook that I use to analyze flow property test results to predict powder flow behavior and design bins and hoppers. It has some nice VBA-macro driven buttons that walk the user through Andrew Jenike's analysis. It's a great learning tool. If you get an error, it's a feature and not a bug. It's likely because you have a powder that's so cohesive, gravity flow is impossible or the wall friction is so great, flow along the wall is not possible at any hopper angle.
Greg Mehos, Ph.D., P.E., • 4 Crusade Road, Westford, MA 01886 USA • 1-978-799-7311
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