Abo Bibliothek: Guest
Fourth International Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2005, Marriot Hotel, Williamsburg, Virginia, USA

DOI: 10.1615/TSFP4

MIXING ANALYSIS OF A SWIRLING RECIRCULATING FLOW USING DNS AND EXPERIMENTAL DATA

pages 491-496
DOI: 10.1615/TSFP4.820
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ABSTRAKT

Fluid flow and mixing of a recirculating, swirling flow was investigated by direct numerical simulation (DNS) at a Reynolds number of Re = 5000. Its accuracy was assessed by grid refinement studies and also by comparing the results to experimental velocity data obtained by laser Doppler velocimetry (LDV). The mixing field was investigated experimentally using spontaneous Raman-scattering and planar laser induced fluorescence (PLIF). Detailed one point statistics will be presented and discussed. In addition a comparison between two point statistics of the velocity and the scalar field will be given. Further on, the impact of a precessing vortex core (PVC) on the mixing process will be examined.
The database will be used in the future for testing 1.) a newly developed model for the turbulent scalar flux (see Klein et al. 2004), as well as 2.) strategies for assessing the quality of large eddy simulations.

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