Downloads - DOCUMENTS on powder testing and hoppER DESIGN
Using Fundamental Properties to Optimize Powder Flowability was published in Tablets & Capsules and explains how formulators can use shear cell and permeability test results to ensure that their blends will reliably flow in bins and hoppers.
Using Solids Flow Properties to Design Mass- and Funnel-Flow Hoppers was published in Powder and Bulk Solids. It's similar to the T&C article, but it includes a funnel flow bin example.
URI Notes is an up-to-date pdf of my book Hopper Design Principles for Chemical Engineers, and I update it regular.y for clarity, brevity, and levity. I use it in the powder handling course that I give at the University of Rhode Island. It requires a password to open because I offer the textbook on my home page. An abridged version of my book Hopper Design Principles for Chemical Engineers does not require a password.
The concepts are straightforward, but the analysis can be painful because the equations are serpentine, and the calculations are iterative. The compressed file named Hopper Design Files contains the Excel files that I use to analyze shear cell and permeability test results to predict powder flow behavior or design bins. The hopper design workbook has some nice VBA-driven macros that walk the user through Jenike's methods.
Moving Bed Processors describes how to modify bins or silos to dry, heat, cool, or react bulk solids.
I have a solids discharge rate equation that is based on fundamentals. I think it's better than any other that has been published. It definitely is better than Beverloo's. The paper that you can download is a work in progress. I hope to publish it one day.
I periodically add other documents on powder handling and processing. Be sure to visit and check for updates.