Evaluation of numerical approaches for the simulation of water-flow in gravity-driven helical mineral separators

Romeijn, T; Fletcher, DF; de Andrade, A

Evaluation of numerical approaches for the simulation of water-flow in gravity-driven helical mineral separators

Romeijn, T Fletcher, DF de Andrade, A

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Publisher:: Taylor & Francis
Publication Type:: Journal Article
Citation:: Separation Science and Technology (Philadelphia), 2023, 58, (14), pp. 2519-2538
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Romeijn, T
dc.contributor.author	Fletcher, DF
dc.contributor.author	de Andrade, A
dc.date.accessioned	2024-04-08T05:57:12Z
dc.date.available	2024-04-08T05:57:12Z
dc.date.issued	2023-01-01
dc.identifier.citation	Separation Science and Technology (Philadelphia), 2023, 58, (14), pp. 2519-2538
dc.identifier.issn	0149-6395
dc.identifier.issn	1520-5754
dc.identifier.uri	http://hdl.handle.net/10453/177561
dc.description.abstract	Advancing the understanding of the fluid behavior in a mineral separation spiral has seen computational fluid dynamic models being validated using various flow properties. In this research article, capturing a focussed line of bubbles, which is commonly encountered in spirals, was utilized as a novel means to evaluate various numerical simulation approaches. To match experimental data, the simulations used a measured wall roughness, wall contact angle, and bubble size, in addition to a fluid domain geometry based on a 3D scan of a full-scale spiral. Through comparison with experimental data, the research investigated the effects of different numerical modeling approaches on the bubble line behavior, calibrated the unknown bubble mass flow rate, and performed a sensitivity analysis on the bubble diameter, wall roughness, and wall contact angle. The effects of changing the drag coefficient, the use of a simplified turbulence model, and the bubble–water interaction were investigated. The only model that allowed the formation of a bubble line was a two-phase Eulerian multi-fluid VOF model with the bubbles being included as a Lagrangian phase, with both drag and virtual mass forces modeled. The use of this model with a full-length domain of the spiral produced the first numerical evidence of a postulated tertiary radial flow in mineral separation spirals.
dc.language	en
dc.publisher	Taylor & Francis
dc.relation.ispartof	Separation Science and Technology (Philadelphia)
dc.relation.isbasedon	10.1080/01496395.2023.2258274
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0301 Analytical Chemistry, 0904 Chemical Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	3401 Analytical chemistry
dc.subject.classification	4004 Chemical engineering
dc.title	Evaluation of numerical approaches for the simulation of water-flow in gravity-driven helical mineral separators
dc.type	Journal Article
utslib.citation.volume	58
utslib.for	0301 Analytical Chemistry
utslib.for	0904 Chemical Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-08T05:57:10Z
pubs.issue	14
pubs.publication-status	Published
pubs.volume	58
utslib.citation.issue	14

Abstract:

Advancing the understanding of the fluid behavior in a mineral separation spiral has seen computational fluid dynamic models being validated using various flow properties. In this research article, capturing a focussed line of bubbles, which is commonly encountered in spirals, was utilized as a novel means to evaluate various numerical simulation approaches. To match experimental data, the simulations used a measured wall roughness, wall contact angle, and bubble size, in addition to a fluid domain geometry based on a 3D scan of a full-scale spiral. Through comparison with experimental data, the research investigated the effects of different numerical modeling approaches on the bubble line behavior, calibrated the unknown bubble mass flow rate, and performed a sensitivity analysis on the bubble diameter, wall roughness, and wall contact angle. The effects of changing the drag coefficient, the use of a simplified turbulence model, and the bubble–water interaction were investigated. The only model that allowed the formation of a bubble line was a two-phase Eulerian multi-fluid VOF model with the bubbles being included as a Lagrangian phase, with both drag and virtual mass forces modeled. The use of this model with a full-length domain of the spiral produced the first numerical evidence of a postulated tertiary radial flow in mineral separation spirals.

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http://hdl.handle.net/10453/177561