Keywords

LES, QMOM, ODT, DQMOM, precipitation modeling

Abstract

This study presents the results of computational fluid dynamics simulations of a multiphase, reacting, turbulent mixing layer in an idealized geometry. The purpose is to compare large-eddy simulation (LES) to one-dimensional turbulence (ODT) and examine the trends of the flow under differing mixing conditions. Aqueous streams are mixed together to precipitate polymorphs of calcium carbonate. The polymorphs of calcium carbonate are tracked numerically using population balance equations (PBE). Each PBE contains all of the relevant physical models to track the particle evolution including nucleation, growth, and aggregation. A simple subgrid mixing model that is convenient for use with PBEs was implemented in the LES code. The higher spatial resolution achievable with ODT allowed an investigation on the effect of resolution on the mixing-model error. The Reynolds number of the flow is varied and is shown to cause a decrease in average particle sizes with higher mixing rates. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3185–3197, 2015

Original Publication Citation

Abboud, A.W., Schroeder, B.B., Saad, T., Smith, S.T., Harris, D.D. and Lignell, D.O. (2015), A numerical comparison of precipitating turbulent flows between large-eddy simulation and one-dimensional turbulence. AIChE J., 61: 3185-3197. https://doi.org/10.1002/aic.14870

Document Type

Peer-Reviewed Article

Publication Date

2015-09-03

Publisher

American Institute of Chemical Engineers

Language

English

College

Ira A. Fulton College of Engineering

Department

Chemical Engineering

University Standing at Time of Publication

Full Professor

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