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Dewatering saturated, networked suspensions with a screw press

Eaves, T; Paterson, D; Hewitt, D; Balmforth, N; Martinez, M; (2020) Dewatering saturated, networked suspensions with a screw press. Journal of Engineering Mathematics , 120 pp. 1-28. 10.1007/s10665-019-10029-3. Green open access

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Abstract

A model is presented for the dewatering of a saturated two-phase medium in a screw press. The model accounts for the detailed two-phase rheological behaviour of the pressed material and splits the press into two zones, an initial well-mixed constant-pressure region followed by an axial transport region in which the total pressure steadily increases. In this latter region, a slowly varying helical coordinate transformation is introduced to help reduce the dynamics to an annular bi-axial compression of the two-phase medium. Unlike previous modelling, the transition point between the two zones is determined self-consistently, rather than set a priori, and the pressure along the length of the press is deduced from the rheology of the two-phase flow rather than averaging the two-phase dynamics over a cross section of the press. The model is compared to experimental observations of the dewatering of a paper-making fibre suspension and of a clay slurry, and is shown to reproduce operational data.

Type: Article
Title: Dewatering saturated, networked suspensions with a screw press
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10665-019-10029-3
Publisher version: https://doi.org/10.1007/s10665-019-10029-3
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics
URI: https://discovery.ucl.ac.uk/id/eprint/10085779
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