Role of turbulent shear rate distribution in aggregation and breakage processes

D L Marchisio, M Soos, J Sefcik, M Morbidelli

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

The effect of spatial flow heterogeneity on shear-induced aggregation and breakage of fine particles in turbulent flow conditions is investigated using computational fluid dynamics (CFD) and population balance modeling. The quadrature method of moments (QMOM), particularly suitable for implementation in commercial CFD codes, has been used to solve the corresponding population balance equation. QMOM is first tested and compared with alternative numerical methods (sectional/fixed-pivot methods) for a specific set of realistic operating conditions. Then QMOM is implemented in a CFD code and the effect of spatial heterogeneities on the cluster mass distribution in a Taylor-Couette vessel is investigated. Simplified models have been derived based on the separation of the timescales of mixing on one hand and of aggregation and breakage on the other and compared with the full CFD model. Guidelines for use and limitations of such models and the identification of the underlying aggregation and breakage kernels are discussed.

LanguageEnglish
Pages158-173
Number of pages16
JournalAIChE Journal
Volume52
Issue number1
DOIs
Publication statusPublished - Jan 2006

Fingerprint

Shear deformation
Hydrodynamics
Computational fluid dynamics
Agglomeration
Method of moments
Turbulent flow
Dynamic models
Numerical methods
Identification (control systems)
Population
Guidelines

Keywords

  • population balance
  • computational fluid dynamics
  • aggregation
  • quadrature method of moments
  • polymer colloids

Cite this

Marchisio, D L ; Soos, M ; Sefcik, J ; Morbidelli, M . / Role of turbulent shear rate distribution in aggregation and breakage processes. In: AIChE Journal. 2006 ; Vol. 52, No. 1. pp. 158-173.
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Role of turbulent shear rate distribution in aggregation and breakage processes. / Marchisio, D L ; Soos, M ; Sefcik, J ; Morbidelli, M .

In: AIChE Journal, Vol. 52, No. 1, 01.2006, p. 158-173.

Research output: Contribution to journalArticle

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