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Scalar Mixing and Large-Scale Coherent Structures in a Turbulent Swirling Jet

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Abstract

The paper presents large eddy simulations of co-annular swirling jets into an open domain. In each of the annuli a passive scalar is introduced and its transport is computed. If the exit of the pilot jet is retracted strong coherent flow structures are generated which substantially impact on the transport and mixing of the scalars. Average and instantaneous fields are discussed to address this issue. A conditional averaging technique is devised and applied to velocity and scalars. This allows to quantify the impact of the coherent structures on the mixing process.

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Author notes

  1. J. Fröhlich

    Present address: Institute of Fluid Mechanics, Technical University of Dresden, 01062, Dresden, Germany

Authors and Affiliations

  1. Institute for Technical Chemistry and Polymer Chemistry, University of Karlsruhe, 76128, Karlsruhe, Germany

    J. Fröhlich

  2. Institute for Hydromechanics, University of Karlsruhe, 76128, Karlsruhe, Germany

    M. García-Villalba & W. Rodi

Authors
  1. J. Fröhlich
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  2. M. García-Villalba
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  3. W. Rodi
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Correspondence to J. Fröhlich.

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Fröhlich, J., García-Villalba, M. & Rodi, W. Scalar Mixing and Large-Scale Coherent Structures in a Turbulent Swirling Jet. Flow Turbulence Combust 80, 47–59 (2008). https://doi.org/10.1007/s10494-007-9121-3

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  • DOI: https://doi.org/10.1007/s10494-007-9121-3

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