Home > Research > Publications & Outputs > Mathematical modelling of batch sedimentation s...

Links

Text available via DOI:

View graph of relations

Mathematical modelling of batch sedimentation subject to slow aggregate densification

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Mathematical modelling of batch sedimentation subject to slow aggregate densification. / Zhang, Yi; Grassia, Paul ; Martin, Alastair et al.
In: Chemical Engineering Science, Vol. 128, 25.05.2015, p. 54-63.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Zhang, Y, Grassia, P, Martin, A, Usher, S & Scales, P 2015, 'Mathematical modelling of batch sedimentation subject to slow aggregate densification', Chemical Engineering Science, vol. 128, pp. 54-63. https://doi.org/10.1016/j.ces.2015.01.066

APA

Zhang, Y., Grassia, P., Martin, A., Usher, S., & Scales, P. (2015). Mathematical modelling of batch sedimentation subject to slow aggregate densification. Chemical Engineering Science, 128, 54-63. https://doi.org/10.1016/j.ces.2015.01.066

Vancouver

Zhang Y, Grassia P, Martin A, Usher S, Scales P. Mathematical modelling of batch sedimentation subject to slow aggregate densification. Chemical Engineering Science. 2015 May 25;128:54-63. doi: 10.1016/j.ces.2015.01.066

Author

Zhang, Yi ; Grassia, Paul ; Martin, Alastair et al. / Mathematical modelling of batch sedimentation subject to slow aggregate densification. In: Chemical Engineering Science. 2015 ; Vol. 128. pp. 54-63.

Bibtex

@article{44ab4f07bb9b4183a219f958dc450073,
title = "Mathematical modelling of batch sedimentation subject to slow aggregate densification",
abstract = "This paper considers an initially networked suspension in a batch settler subjected to very slow aggregate densification. The so-called pseudo-steady state aggregate densification theory developed by van Deventer (2012) has been extended to the case of initially networked suspensions. The solids behaviour and the evolutions of the suspension height and the consolidated bed height in the batch settler have been predicted using the extended pseudo-steady state theory. Different formulae for the weight-bearing strength of the consolidated bed (so-called weak gel and strong gel formulae, which differ near the top of the bed) are considered. The suspension height approaches the consolidated bed height far more quickly when using the weak gel formula than when using the strong gel one. This paper also investigates how the initial feed solids volume fraction and the initial suspension height affect the evolutions of the heights of the suspension and the consolidated bed, as well as the determinations of the solids volume fractions obtained at the bottom of the batch settler. When the initial feed solids fraction is sufficiently large and/or the initial suspension is sufficiently tall, the densification process has little effect on the solids fraction observed at the bottom of the settler.",
keywords = "Gels, Rheology, Suspension, Mathematical modelling, Compressive yield stress, Sedimentation",
author = "Yi Zhang and Paul Grassia and Alastair Martin and Shane Usher and Peter Scales",
year = "2015",
month = may,
day = "25",
doi = "10.1016/j.ces.2015.01.066",
language = "English",
volume = "128",
pages = "54--63",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Mathematical modelling of batch sedimentation subject to slow aggregate densification

AU - Zhang, Yi

AU - Grassia, Paul

AU - Martin, Alastair

AU - Usher, Shane

AU - Scales, Peter

PY - 2015/5/25

Y1 - 2015/5/25

N2 - This paper considers an initially networked suspension in a batch settler subjected to very slow aggregate densification. The so-called pseudo-steady state aggregate densification theory developed by van Deventer (2012) has been extended to the case of initially networked suspensions. The solids behaviour and the evolutions of the suspension height and the consolidated bed height in the batch settler have been predicted using the extended pseudo-steady state theory. Different formulae for the weight-bearing strength of the consolidated bed (so-called weak gel and strong gel formulae, which differ near the top of the bed) are considered. The suspension height approaches the consolidated bed height far more quickly when using the weak gel formula than when using the strong gel one. This paper also investigates how the initial feed solids volume fraction and the initial suspension height affect the evolutions of the heights of the suspension and the consolidated bed, as well as the determinations of the solids volume fractions obtained at the bottom of the batch settler. When the initial feed solids fraction is sufficiently large and/or the initial suspension is sufficiently tall, the densification process has little effect on the solids fraction observed at the bottom of the settler.

AB - This paper considers an initially networked suspension in a batch settler subjected to very slow aggregate densification. The so-called pseudo-steady state aggregate densification theory developed by van Deventer (2012) has been extended to the case of initially networked suspensions. The solids behaviour and the evolutions of the suspension height and the consolidated bed height in the batch settler have been predicted using the extended pseudo-steady state theory. Different formulae for the weight-bearing strength of the consolidated bed (so-called weak gel and strong gel formulae, which differ near the top of the bed) are considered. The suspension height approaches the consolidated bed height far more quickly when using the weak gel formula than when using the strong gel one. This paper also investigates how the initial feed solids volume fraction and the initial suspension height affect the evolutions of the heights of the suspension and the consolidated bed, as well as the determinations of the solids volume fractions obtained at the bottom of the batch settler. When the initial feed solids fraction is sufficiently large and/or the initial suspension is sufficiently tall, the densification process has little effect on the solids fraction observed at the bottom of the settler.

KW - Gels

KW - Rheology

KW - Suspension

KW - Mathematical modelling

KW - Compressive yield stress

KW - Sedimentation

U2 - 10.1016/j.ces.2015.01.066

DO - 10.1016/j.ces.2015.01.066

M3 - Journal article

VL - 128

SP - 54

EP - 63

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -