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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Imprimer: 1940-2503
ISSN En ligne: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2011002699
pages 227-235

ISOTHERMAL REACTIVE MIXING LAYER : NUMERICAL STUDY

Mohamed Si-Ameur
LESEI Laboratory, Department of Mechanical Engineering, Technology Faculty, University of Batna 2, Algeria

RÉSUMÉ

Numerical simulations are used to study the space development of a reactive mixing layer which allows to observe the mark of the coherent structures of turbulence on the chemical activity within the flow. The chemical reactions within the shear flows are important in a broad range of applications in particular in chemical engineering and aeronautics, it greatly helps to comprehend fundamental mechanisms of turbulence. Reaction with low heat release permits to detail the interaction between flow dynamics and chemical activity. Typical reaction rate fields patterns are presented in this paper, taken into account reaction time, diffusive proprieties, dilution of reactants. Reaction develops intermittently a long the coherent structures as reaction gets faster. For slow reaction, it develops in a wide domain, which includes the eddy cores. Basic dependence with diffusive and chemical proprieties has been highlighted through the influence of Schmidt number and stochiometric coefficients. The agreement with the experimentally results is good, particularly the growth rate of shear layer thickness and wavelength of instabilities which give rise to turbulent structures.


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