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


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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