The University of Southampton
University of Southampton Institutional Repository

Effect of poly-dispersity on the stability of agglomerates subjected to simple fluid strain fields

Effect of poly-dispersity on the stability of agglomerates subjected to simple fluid strain fields
Effect of poly-dispersity on the stability of agglomerates subjected to simple fluid strain fields
A numerical investigation of agglomerate breakup is conducted. By combining the discrete element method with hydrodynamic forces, both monodisperse and polydisperse agglomerates are subjected to three types of flow field: simple, elongational and pure rotational shear. By studying the break-up process sequence in each flow type, qualitative information about the fundamental mechanisms by which deagglomeration occurs is compared between cases and with the literature. The quantitative effectiveness of simple shear and elongational flows to break-up a monodisperse agglomerate agrees well with the relevant literature. Rotational flows are found to differ fundamentally in the way in which agglomerate break-up occurs. By minimising agglomerate translation, the energy from the flow increases the agglomerated angular momentum, eventually causing failure by rupture. Shear flows with open streamlines however may convect the agglomerate away before being able to achieve breakup. Polydispersity is found to have an effect on the qualitative break-up effectiveness; however, the fundamental break-up mechanisms remain the same as for the monodisperse agglomerate.
0032-5910
241-249
Shrimpton, J.S.
9cf82d2e-2f00-4ddf-bd19-9aff443784af
Danby, M.
1118740e-af5e-4bef-8eaf-31f69524c6b2
Shrimpton, J.S.
9cf82d2e-2f00-4ddf-bd19-9aff443784af
Danby, M.
1118740e-af5e-4bef-8eaf-31f69524c6b2

Shrimpton, J.S. and Danby, M. (2012) Effect of poly-dispersity on the stability of agglomerates subjected to simple fluid strain fields. Powder Technology, 228, 241-249. (doi:10.1016/j.powtec.2012.05.025).

Record type: Article

Abstract

A numerical investigation of agglomerate breakup is conducted. By combining the discrete element method with hydrodynamic forces, both monodisperse and polydisperse agglomerates are subjected to three types of flow field: simple, elongational and pure rotational shear. By studying the break-up process sequence in each flow type, qualitative information about the fundamental mechanisms by which deagglomeration occurs is compared between cases and with the literature. The quantitative effectiveness of simple shear and elongational flows to break-up a monodisperse agglomerate agrees well with the relevant literature. Rotational flows are found to differ fundamentally in the way in which agglomerate break-up occurs. By minimising agglomerate translation, the energy from the flow increases the agglomerated angular momentum, eventually causing failure by rupture. Shear flows with open streamlines however may convect the agglomerate away before being able to achieve breakup. Polydispersity is found to have an effect on the qualitative break-up effectiveness; however, the fundamental break-up mechanisms remain the same as for the monodisperse agglomerate.

This record has no associated files available for download.

More information

Published date: September 2012
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 349244
URI: http://eprints.soton.ac.uk/id/eprint/349244
ISSN: 0032-5910
PURE UUID: 5b5436e2-8357-46c3-ae6e-a027884a765f

Catalogue record

Date deposited: 26 Feb 2013 16:58
Last modified: 14 Mar 2024 13:10

Export record

Altmetrics

Contributors

Author: J.S. Shrimpton
Author: M. Danby

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×