Abo Bibliothek: Guest
Eighth International Symposium on Turbulence and Shear Flow Phenomena
August, 28-30, 2013, Poitiers, Futuroscope, France

DOI: 10.1615/TSFP8

DIRECT NUMERICAL SIMULATION AND MODELING OF A TURBULENT BOUNDARY LAYER WITH SEPARATION AND REATTACHMENT

pages 1-6
DOI: 10.1615/TSFP8.600
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ABSTRAKT

Direct numerical simulations (DNSs) of a flat-plate turbulent boundary layer with separation and reattachment have been carried out over a range of Reynolds numbers. The strong blowing and suction are imposed at the upper boundary for producing a large turbulent separation bubble, thus dealing with massive separation. The inlet data prescribed are those from DNSs of a zero-pressure-gradient turbulent boundary layer. Three values of the Reynolds number based on the freestream velocity and inlet momentum thickness (viz., 300, 600 and 983) are used. Particular attention is given to Reynolds number dependence in the bubble, streamline curvature effects and similarity to a mixing layer. Also made is an evaluation of the Reynolds-averaged Navier-Stokes (RANS) turbulence models such as k-ε, k-ω and SST models using the resulting DNS data.

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