Turbulent Reacting Flow Simulation Based on the Multi-Environment Mixing Model

Mierka, O., Stopka, J., Kiša, M. and Jelemenský, Ľ. Turbulent Reacting Flow Simulation Based on the Multi-Environment Mixing Model Chemical Papers, Vol.59, No. 6a, 2005, 394-402

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  
Attached Files
Name Description MIMEType Size Downloads
n596aa394.pdf 596aa394.pdf application/pdf 1.82MB 0

Author(s) Mierka, O.
Stopka, J.
Kiša, M.
Jelemenský, Ľ.
Title Turbulent Reacting Flow Simulation Based on the Multi-Environment Mixing Model
Journal name Chemical Papers
Publication date 2005
Year available 2005
Volume number 59
Issue number 6a
ISSN 0366-6352
Start page 394
End page 402
Place of publication Poland
Publisher Versita
Collection year 2005
Language english
Subject 290000 Engineering and Technology
290600 Chemical Engineering
Abstract/Summary In this work a CFD approach is described for modelling fast chemical reactions in turbulent liquid flows. The relevant model developed for this purpose is composed of a core for the solution of Navier—Stokes equations and extended with an appropriate turbulence model. Treatment of additional (passive or active) scalars is performed on the basis of velocity fields obtained by means of a “hydrodynamic core engine”. The developed CFD model was benchmarked on the so-called backward-facing step problem and reasonably correlated with the values reported. The turbulence model used to simulate micromixing phenomena was derived from the scalar dissipation rate, which is obtained from the turbulent kinetic energy and its dissipation. For this purpose, a multi-environment mixing model was developed. This model enables modelling of the flow of nonpremixed environments of liquid phases, where chemical reactions do not occur, and also the flow of environments with different reaction rates due to different temperatures and concentrations of species involved. Generally, in the case of modelling of N environments and S chemical species, the use of such micromixing approach means evaluation of N+(N − 2) S+N−1 additional scalar fields of individual environments, temperatures, and species in these environments. As a reaction system, a commonly used set of competitive-consecutive reactions (A + B → 2P A+ P → 2R) occurring in a triple-jet channel reactor was considered. Simulations were executed in 2D. Their results, however, need validation by experimental data.
User Comments
Access Statistics: 0 Abstract Views, 0 File Downloads Detailed Statistics
Created: Fri, 08 Jan 2010, 12:09:11 CET by Iveta Drtilová . Detailed History