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Measuring the flow properties of small powder samples using an avalanche tester

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posted on 19.04.2016 by V. Jaggi, Mark Leaper, Andrew J. Ingham
The feasibility of using a small-scale avalanche tester to measure the flow properties of pharmaceutical lactose powders was examined. The modes of behavior observed in larger systems were displayed and showed a clear distinction between angular, free-flowing particles and more spherical particles of similar flow characteristics. Angular Lactohale LH100 particles showed slumping behavior at a rotational frequency of 0.33 Hz that disappeared at higher frequencies. Spherical lactose powder with a similar flow function to LH100 only showed rolling behavior under the same conditions, as did more cohesive powders LH200 and LH300. Further investigation of the LH100 data using fast Fourier analysis showed that the slumping frequency was one tenth of the rotational frequency.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Drying Technology

Volume

34

Issue

6

Pages

723 - 728

Citation

JAGGI, V., LEAPER, M. and INGHAM, A., 2016. Measuring the flow properties of small powder samples using an avalanche tester. Drying Technology, 34 (6), pp.723-728.

Publisher

© Taylor & Francis

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016-03-28

Notes

This is an Accepted Manuscript of an article published by Taylor & Francis in Drying Technology on 27/07/2015, available online: http://dx.doi.org/10.1080/07373937.2015.1072093.

ISSN

0737-3937

eISSN

1532-2300

Language

en

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