Ultrasonic wave propagation in powders

Abstract

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.

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Item Type:	Proceedings Paper
Authors/Creators:	Al-Lashi, RS Povey, MJW https://orcid.org/0000-0002-9740-2596 Watson, NJ
Copyright, Publisher and Additional Information:	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.
Dates:	Accepted: 30 April 2018 Published (online): 11 May 2018 Published: May 2018
Institution:	The University of Leeds
Depositing User:	Symplectic Publications
Date Deposited:	31 Jul 2018 12:47
Last Modified:	25 Jun 2023 21:27
Status:	Published
Publisher:	IOP Publishing
Identification Number:	10.1088/1742-6596/1017/1/012001
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:133971

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Ultrasonic wave propagation in powders

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