Large Eddy Simulation of mixing effects on the course of parallel chemical reactions and comparison with k–ɛ modeling

Łukasz Makowski , Jerzy Robert Bałdyga

Abstract

The way in which reagents are mixed can have a large influence on the product distribution of chemical reactions. To model effects of mixing on various scales on the course of chemical reactions the method of Large Eddy Simulation (LES) of non-premixed, turbulent reactive flows of incompressible fluids is considered in this work. The subgrid modeling of chemical reaction is based on a beta distribution of the mixture fraction in combination with a conditional moment closure based on linear interpolation of local instantaneous reactant concentration values. The predictions obtained with LES are compared with experimental data for fast parallel chemical reactions, the fluid velocity measured using Particle Image Velocity (PIV) technique and the passive tracer concentration measured using the Planar Laser Induced Fluorescence (PLIF) technique. Predictions of the model based on LES are compared as well with results obtained using the non-equilibrium multiple-time-scale mixing model combined with a standard k–ɛ model and employing similar conditional moment closure as LES, applied, however, at larger scale. All comparisons show a very good performance of the model based on LES.
Author Łukasz Makowski (FCPE / DCRED)
Łukasz Makowski,,
- Department of Chemical Reactor Engineering and Dynamics
, Jerzy Robert Bałdyga (FCPE / DCRED)
Jerzy Robert Bałdyga,,
- Department of Chemical Reactor Engineering and Dynamics
Journal seriesChemical Engineering and Processing : Process Intensification, ISSN 0255-2701, (A 30 pkt)
Issue year2011
Vol50
No10
Pages1035-1040
Publication size in sheets0.5
Keywords in Englishchemical reactions, LES, non-premixed flows, parallel reactions, product distribution
ASJC Classification2209 Industrial and Manufacturing Engineering; 1508 Process Chemistry and Technology; 2102 Energy Engineering and Power Technology; 1500 General Chemical Engineering; 1600 General Chemistry
DOIDOI:10.1016/j.cep.2011.06.003
URL http://www.sciencedirect.com/science/article/pii/S0255270111001279
Languageen angielski
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Makowski Ł., Bałdyga J.R. - Large Eddy Simulation of mixing....pdf 645.24 KB
Score (nominal)30
Publication indicators WoS Citations = 6; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 1.427; WoS Impact Factor: 2011 = 1.924 (2) - 2011=2.167 (5)
Citation count*3 (2015-03-28)
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