### Abstract

A dissolution process of solid particles suspended in a turbulent flow of a Rushton turbine stirred tank is studied numerically by large eddy simulations including passive scalar transport and particle tracking. The lattice-Boltzmann flow solver and the Smagorinsky subgrid-scale model are adopted for solving the stirred tank flow. To the LES a finite volume scheme is coupled that solves the convection-diffusion equation for the solute. The solid particles are tracked in the Eulerian flow field through solving the dynamic equations of linear and rotational motion of the particles. Particle-particle and particle-wall collisions are included, and the particle transport code is two-way coupled. The simulation has been restricted to a lab-scale tank with a volume equal to 10(-2) m(3). A set of 7 x 10(6) spherical particles 0.3 mm in diameter are released in the top part of the tank (10% of the tank volume), resulting in a local initial solids volume fraction of 10%. The particle properties are such that they resemble those of calcium chloride beads. The focus is on solids and scalar concentration distributions, particle size distributions, and the dissolution time. For the particular process considered, the dissolution time is found to be at most one order of magnitude larger than the time needed to fully disperse the solids throughout the tank. (c) 2005 Elsevier Ltd. All rights reserved.

Original language | English |
---|---|

Pages (from-to) | 3025-3032 |

Number of pages | 8 |

Journal | Chemical Engineering Science |

Volume | 61 |

Issue number | 9 |

DOIs | |

Publication status | Published - May 2006 |

Event | 7th International Conference on Fluid Mixing - London Duration: 10 Apr 2006 → 12 Apr 2006 |

### Keywords

- stirred tank
- turbulence
- dissolution
- suspension
- simulation
- particle transport
- LARGE-EDDY SIMULATION
- LATTICE-BOLTZMANN SCHEME
- RUSHTON TURBINE
- FLUID-FLOW

### Cite this

*Chemical Engineering Science*,

*61*(9), 3025-3032. https://doi.org/10.1016/j.ces.2005.10.058

**Numerical simulation of a dissolution process in a stirred tank reactor.** / Hartmann, H; Derksen, JJ; van den Akker, HEA.

Research output: Contribution to journal › Article

*Chemical Engineering Science*, vol. 61, no. 9, pp. 3025-3032. https://doi.org/10.1016/j.ces.2005.10.058

}

TY - JOUR

T1 - Numerical simulation of a dissolution process in a stirred tank reactor

AU - Hartmann, H

AU - Derksen, JJ

AU - van den Akker, HEA

PY - 2006/5

Y1 - 2006/5

N2 - A dissolution process of solid particles suspended in a turbulent flow of a Rushton turbine stirred tank is studied numerically by large eddy simulations including passive scalar transport and particle tracking. The lattice-Boltzmann flow solver and the Smagorinsky subgrid-scale model are adopted for solving the stirred tank flow. To the LES a finite volume scheme is coupled that solves the convection-diffusion equation for the solute. The solid particles are tracked in the Eulerian flow field through solving the dynamic equations of linear and rotational motion of the particles. Particle-particle and particle-wall collisions are included, and the particle transport code is two-way coupled. The simulation has been restricted to a lab-scale tank with a volume equal to 10(-2) m(3). A set of 7 x 10(6) spherical particles 0.3 mm in diameter are released in the top part of the tank (10% of the tank volume), resulting in a local initial solids volume fraction of 10%. The particle properties are such that they resemble those of calcium chloride beads. The focus is on solids and scalar concentration distributions, particle size distributions, and the dissolution time. For the particular process considered, the dissolution time is found to be at most one order of magnitude larger than the time needed to fully disperse the solids throughout the tank. (c) 2005 Elsevier Ltd. All rights reserved.

AB - A dissolution process of solid particles suspended in a turbulent flow of a Rushton turbine stirred tank is studied numerically by large eddy simulations including passive scalar transport and particle tracking. The lattice-Boltzmann flow solver and the Smagorinsky subgrid-scale model are adopted for solving the stirred tank flow. To the LES a finite volume scheme is coupled that solves the convection-diffusion equation for the solute. The solid particles are tracked in the Eulerian flow field through solving the dynamic equations of linear and rotational motion of the particles. Particle-particle and particle-wall collisions are included, and the particle transport code is two-way coupled. The simulation has been restricted to a lab-scale tank with a volume equal to 10(-2) m(3). A set of 7 x 10(6) spherical particles 0.3 mm in diameter are released in the top part of the tank (10% of the tank volume), resulting in a local initial solids volume fraction of 10%. The particle properties are such that they resemble those of calcium chloride beads. The focus is on solids and scalar concentration distributions, particle size distributions, and the dissolution time. For the particular process considered, the dissolution time is found to be at most one order of magnitude larger than the time needed to fully disperse the solids throughout the tank. (c) 2005 Elsevier Ltd. All rights reserved.

KW - stirred tank

KW - turbulence

KW - dissolution

KW - suspension

KW - simulation

KW - particle transport

KW - LARGE-EDDY SIMULATION

KW - LATTICE-BOLTZMANN SCHEME

KW - RUSHTON TURBINE

KW - FLUID-FLOW

U2 - 10.1016/j.ces.2005.10.058

DO - 10.1016/j.ces.2005.10.058

M3 - Article

VL - 61

SP - 3025

EP - 3032

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

IS - 9

ER -