Paterson, DT;
Eaves, TS;
Hewitt, DR;
Balmforth, NJ;
Martinez, DM;
(2021)
On two-phase modeling of dewatering pulp suspensions.
AIChE Journal
, 67
(9)
, Article e17277. 10.1002/aic.17277.
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Abstract
An experimental study of the dewatering of wood-pulp fiber suspensions by uniaxial compression is presented, to rationalize their dewatering dynamics within a two-phase framework. Twenty-seven pulp suspensions are examined, encompassing materials with different origins, preparation methodologies, and secondary treatments. For each suspension in this library, the network permeability and compressive yield stress are calibrated at low rates of dewatering. Faster compressions are then used to verify that a solid bulk viscosity is essential to match two-phase model predictions with experimental observations, and to parameterize its magnitude. By comparing the results with a suspension of nylon fibers, we demonstrate that none of the wood-pulp suspensions behave like an idealized fibrous porous medium. Nevertheless, the properties of pulp fiber networks can be reconciled within a two-phase framework, and comparisons made between different wood-pulp suspensions and between wood-pulp and nylon fibers, by appealing to potential microstructural origins of their macroscopic behavior.
| Type: | Article |
|---|---|
| Title: | On two-phase modeling of dewatering pulp suspensions |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/aic.17277 |
| Publisher version: | https://doi.org/10.1002/aic.17277 |
| Language: | English |
| Additional information: | © 2021 The Authors. AIChE Journal published by Wiley Periodicals LLC on behalf of American Institute of Chemical Engineers. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | fibers, multiphase flow, porous media, solid/liquid separations, suspensions |
| UCL classification: | UCL 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-pp.ucl.ac.uk/id/eprint/10127199 |
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