A numerical study on orthokinetic agglomeration in stirred tanks

E. D. Hollander; J. J. Derksen; H. M.J. Kramer; G. M. Van Rosmalen; H. E.A. Van Den Akker

doi:10.1016/S0032-5910(02)00261-9

A numerical study on orthokinetic agglomeration in stirred tanks

E. D. Hollander, J. J. Derksen, H. M.J. Kramer, G. M. Van Rosmalen, H. E.A. Van Den Akker

Delft University of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

A numerical study on the scale-up behaviour of orthokinetic agglomeration in stirred tanks is presented. Large Eddy flow simulations were performed to obtain an accurate description of the turbulent flow encountered in stirred vessels, equipped with either a Rushton or a pitched blade turbine. Simultaneously, the convection-reaction equation for the particle number concentration is solved. Equal resolutions were used for the flow simulations and the particle concentration equation. Agglomeration was incorporated by making use of the nonlinear agglomeration model proposed by Mumtaz et al. [Trans. Inst. Chem. Eng. 75 (1997) 152]. Reactor performance for vessel sizes in the range of 1 to 10000 l was simulated. Three scale-up rules (viz. constant Re number, specific power input, and impeller tip speed) were investigated. It was found that impeller shape, vessel size, and Re number have a profound effect on reactor performance.

Original language	English
Pages (from-to)	169-173
Number of pages	5
Journal	Powder Technology
Volume	130
Issue number	1-3
DOIs	https://doi.org/10.1016/S0032-5910(02)00261-9
Publication status	Published - 19 Feb 2003
Externally published	Yes

Keywords

Agglomeration
Modelling
Orthokinetic
Stirred tanks
Turbulence

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10.1016/S0032-5910(02)00261-9

Cite this

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title = "A numerical study on orthokinetic agglomeration in stirred tanks",

abstract = "A numerical study on the scale-up behaviour of orthokinetic agglomeration in stirred tanks is presented. Large Eddy flow simulations were performed to obtain an accurate description of the turbulent flow encountered in stirred vessels, equipped with either a Rushton or a pitched blade turbine. Simultaneously, the convection-reaction equation for the particle number concentration is solved. Equal resolutions were used for the flow simulations and the particle concentration equation. Agglomeration was incorporated by making use of the nonlinear agglomeration model proposed by Mumtaz et al. [Trans. Inst. Chem. Eng. 75 (1997) 152]. Reactor performance for vessel sizes in the range of 1 to 10000 l was simulated. Three scale-up rules (viz. constant Re number, specific power input, and impeller tip speed) were investigated. It was found that impeller shape, vessel size, and Re number have a profound effect on reactor performance.",

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author = "Hollander, {E. D.} and Derksen, {J. J.} and Kramer, {H. M.J.} and {Van Rosmalen}, {G. M.} and {Van Den Akker}, {H. E.A.}",

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doi = "10.1016/S0032-5910(02)00261-9",

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AU - Hollander, E. D.

AU - Derksen, J. J.

AU - Kramer, H. M.J.

AU - Van Rosmalen, G. M.

AU - Van Den Akker, H. E.A.

PY - 2003/2/19

Y1 - 2003/2/19

N2 - A numerical study on the scale-up behaviour of orthokinetic agglomeration in stirred tanks is presented. Large Eddy flow simulations were performed to obtain an accurate description of the turbulent flow encountered in stirred vessels, equipped with either a Rushton or a pitched blade turbine. Simultaneously, the convection-reaction equation for the particle number concentration is solved. Equal resolutions were used for the flow simulations and the particle concentration equation. Agglomeration was incorporated by making use of the nonlinear agglomeration model proposed by Mumtaz et al. [Trans. Inst. Chem. Eng. 75 (1997) 152]. Reactor performance for vessel sizes in the range of 1 to 10000 l was simulated. Three scale-up rules (viz. constant Re number, specific power input, and impeller tip speed) were investigated. It was found that impeller shape, vessel size, and Re number have a profound effect on reactor performance.

AB - A numerical study on the scale-up behaviour of orthokinetic agglomeration in stirred tanks is presented. Large Eddy flow simulations were performed to obtain an accurate description of the turbulent flow encountered in stirred vessels, equipped with either a Rushton or a pitched blade turbine. Simultaneously, the convection-reaction equation for the particle number concentration is solved. Equal resolutions were used for the flow simulations and the particle concentration equation. Agglomeration was incorporated by making use of the nonlinear agglomeration model proposed by Mumtaz et al. [Trans. Inst. Chem. Eng. 75 (1997) 152]. Reactor performance for vessel sizes in the range of 1 to 10000 l was simulated. Three scale-up rules (viz. constant Re number, specific power input, and impeller tip speed) were investigated. It was found that impeller shape, vessel size, and Re number have a profound effect on reactor performance.

KW - Agglomeration

KW - Modelling

KW - Orthokinetic

KW - Stirred tanks

KW - Turbulence

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VL - 130

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IS - 1-3

ER -

A numerical study on orthokinetic agglomeration in stirred tanks

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Keywords

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