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Large eddy simulation of turbulent mixing and fast chemistry at high Schmidt and Reynolds numbers

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1550
pages 1504-1515

Matthias Walter
Institute for Modeling and Simulation Faculty of Mechanical Engineering and Marine Technology University of Rostock Albert-Einstein-Str. 2, D-18059 Rostock, Germany

Nikolai Kornev
Chair of Modeling and Simulation, Department of Mechanical Engineering and Marine Technology, University of Rostock, Albert-Einstein-Str. 2, 18055 Rostock, Germany

Egon Hassel
Institute for Technical Thermodynamics Faculty of Mechanical Engineering and Marine Technology University of Rostock Albert-Einstein-Str. 2, D-18059 Rostock, Germany

Resumo

Large eddy simulation is used to investigate passive and reactive scalar mixing at high Reynolds and Schmidt numbers in order to prove capability of the LES micro-mixing approaches based on the Eddy Dissipation Model, Multi Environment Model and presumed-PDF with Infinitely Fast Chemistry Model properly simulating liquid reacting flows. Simulations were performed for a fast neutralization reaction in a confined jet reactor. The results obtained for reactive transport revealed discrepancies in the determination of micro-mixing rate and product concentration. Based on PLIF measurements a new simple conditional model for infinitely fast chemistry has been developed and successfully applied to jet mixer configuration.

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