Simulations of dissolution of spherical particles in laminar shear flow

J. J. Derksen*, Gavin Reynolds, Alex Crampton, Zhenyu Huang, Jonathan Booth

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Simulations of dense suspensions of spherical solid particles in a Newtonian liquid carrier phase under simple shear flow have been performed. The simulations include solid-liquid mass transfer and (related) dissolution of the solids phase in the liquid. The interfaces between the solid particles and the liquid are fully resolved: in terms of the flow dynamics we apply a no-slip condition there and simulate the flow of the interstitial liquid by means of the lattice-Boltzmann method. In terms of mass transfer we solve a convection-diffusion equation for the solute concentration in the liquid with the saturation concentration imposed at the surface of the particles. The conditions are such that the flow is laminar (particle-bases Reynolds number significantly less than one). Peclet numbers are significant (order 100) which imposes strong demands on proper resolution of the mass transfer process. Results include dissolution times as a function of process conditions such as shear rate, solids loading, diffusivity and solubility. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)66-78
Number of pages13
JournalChemical Engineering Research & Design
Volume93
Early online date4 Jul 2014
DOIs
Publication statusPublished - Jan 2015

Keywords

  • Dissolution
  • Solid-liquid suspension
  • Mass transfer
  • Lattice-Boltzmann
  • Solubility
  • Laminar shear flow
  • Large-eddy simulation
  • Water-soluble drugs
  • Manufacturing methods
  • Niumerical-simulation
  • Dense suspensions
  • Solid Dispersions
  • Rate enhancement
  • Stirred tank
  • Spheres
  • Beds

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