Ultrasonic wave propagation in powders

Al-Lashi, R.S. ORCID: 0000-0002-7775-8181, Povey, M.J.W. and Watson, N.J., 2018. Ultrasonic wave propagation in powders. Journal of Physics: Conference Series, 1017: 012001. ISSN 1742-6588

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Powder clumps (cakes) has a significant effect on the flowability and stability of powders. Powder caking is mainly caused by moisture migration due to wetting and environmental (temperature and humidity) changes. The process of moisture migration caking involves creating liquid bridges between the particles during condensation which subsequently harden to form solid bridges. Therefore, an effective and reliable technique is required to quantitatively and non-invasively monitor caking kinetics and effective stiffness. This paper describes two ultrasonic instruments (ultrasonic velocity pulse and airborne ultrasound systems) that have been used to monitor the caking phenomenon. Also, it discusses the relationship between the ultrasonic velocity and attenuation measurements and tracking caking kinetics and the effective stiffness of powders.

Item Type: Journal article
Description: 16th Anglo-French Physical Acoustics Conference (AFPAC), Marseille, France, 23–25 January 2017
Publication Title: Journal of Physics: Conference Series
Creators: Al-Lashi, R.S., Povey, M.J.W. and Watson, N.J.
Publisher: IOP Publishing
Date: 11 May 2018
Volume: 1017
ISSN: 1742-6588
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Divisions: Schools > School of Science and Technology
Record created by: Jonathan Gallacher
Date Added: 30 May 2018 14:05
Last Modified: 30 May 2018 14:05
URI: https://irep.ntu.ac.uk/id/eprint/33746

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