The microscopic modelling of hydrodynamics in industrial crystallisers

A ten Cate, JJ Derksen, HJM Kramer, GM van Rosmalen, HEA Van den Akker

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In this contribution a method for the calculation of crystal-crystal collisions in the flow field of an industrial crystalliser is proposed. The method consists of two steps. The first step is to simulate the internal Row of the crystalliser as a whole. For this purpose, the simulation of the internal Row of an 1100 1 draft tube baffled crystalliser at a Reynolds number of 240,000 is presented. This simulation was done with a lattice-Boltzmann scheme with a Smagorinsky sub-grid-scale turbulence model (c(s) was 0.11) on approximately 35.5 x 10(6) grid nodes. The second step of the method consists of simulating individual crystals in a fully periodic box with turbulent conditions that represent the conditions in a point of the crystalliser. Thus collision frequencies and intensities of the crystals under the local hydrodynamic regime can be obtained. In this contribution a feasibility study of this second step is described. A theoretical framework is established to identify the key parameters that determine the relationship between the crystalliser flow and the box simulations. Based on this framework, conditions for box simulations representing three monitor points in the simulated crystalliser are calculated. Finally, to demonstrate the method of predicting the motion of individual particles, sedimentation and consecutive collision of a single sphere with a solid wall is simulated. (C) 2001 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2495-2509
Number of pages15
JournalChemical Engineering Science
Volume56
Issue number7
Publication statusPublished - Apr 2001
EventJoint Meeting of the 13th International Symposium on Industrial Crystallisation/5th International Symposium on CrystalGrowth of Organic Materials - CAMBRIDGE
Duration: 1 Sep 1999 → …

Keywords

  • crystallisation
  • lattice-Boltzmann
  • collision rate
  • large eddy simulation
  • discrete particle simulation
  • turbulence
  • DISCRETIZED BOLTZMANN-EQUATION
  • CRYSTALLIZATION PROCESSES PART
  • NUMERICAL SIMULATIONS
  • FLUID-FLOW
  • PARTICULATE SUSPENSIONS
  • BRITTLE-FRACTURE
  • COLLISIONS
  • SCHEME

Cite this

ten Cate, A., Derksen, JJ., Kramer, HJM., van Rosmalen, GM., & Van den Akker, HEA. (2001). The microscopic modelling of hydrodynamics in industrial crystallisers. Chemical Engineering Science, 56(7), 2495-2509.

The microscopic modelling of hydrodynamics in industrial crystallisers. / ten Cate, A; Derksen, JJ; Kramer, HJM; van Rosmalen, GM; Van den Akker, HEA.

In: Chemical Engineering Science, Vol. 56, No. 7, 04.2001, p. 2495-2509.

Research output: Contribution to journalArticle

ten Cate, A, Derksen, JJ, Kramer, HJM, van Rosmalen, GM & Van den Akker, HEA 2001, 'The microscopic modelling of hydrodynamics in industrial crystallisers' Chemical Engineering Science, vol. 56, no. 7, pp. 2495-2509.
ten Cate A, Derksen JJ, Kramer HJM, van Rosmalen GM, Van den Akker HEA. The microscopic modelling of hydrodynamics in industrial crystallisers. Chemical Engineering Science. 2001 Apr;56(7):2495-2509.
ten Cate, A ; Derksen, JJ ; Kramer, HJM ; van Rosmalen, GM ; Van den Akker, HEA. / The microscopic modelling of hydrodynamics in industrial crystallisers. In: Chemical Engineering Science. 2001 ; Vol. 56, No. 7. pp. 2495-2509.
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AB - In this contribution a method for the calculation of crystal-crystal collisions in the flow field of an industrial crystalliser is proposed. The method consists of two steps. The first step is to simulate the internal Row of the crystalliser as a whole. For this purpose, the simulation of the internal Row of an 1100 1 draft tube baffled crystalliser at a Reynolds number of 240,000 is presented. This simulation was done with a lattice-Boltzmann scheme with a Smagorinsky sub-grid-scale turbulence model (c(s) was 0.11) on approximately 35.5 x 10(6) grid nodes. The second step of the method consists of simulating individual crystals in a fully periodic box with turbulent conditions that represent the conditions in a point of the crystalliser. Thus collision frequencies and intensities of the crystals under the local hydrodynamic regime can be obtained. In this contribution a feasibility study of this second step is described. A theoretical framework is established to identify the key parameters that determine the relationship between the crystalliser flow and the box simulations. Based on this framework, conditions for box simulations representing three monitor points in the simulated crystalliser are calculated. Finally, to demonstrate the method of predicting the motion of individual particles, sedimentation and consecutive collision of a single sphere with a solid wall is simulated. (C) 2001 Elsevier Science Ltd. All rights reserved.

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KW - DISCRETIZED BOLTZMANN-EQUATION

KW - CRYSTALLIZATION PROCESSES PART

KW - NUMERICAL SIMULATIONS

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KW - PARTICULATE SUSPENSIONS

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