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SUMMARY:Reynolds-stress-constrained subgrid-scale stress model for large e
 ddy simulation of wall bounded turbulent flow - Chen\, S (JHU and PKU)
DTSTART:20080908T134000Z
DTEND:20080908T140000Z
UID:TALK13338@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:In the traditional hybrid RANS/LES approaches for the simulati
 on of wall-bounded fluid turbulence\, such as the detached eddy simulation
  (DES)\, the whole flow domain is divided into the inner layer and outer l
 ayer. Typically the Reynolds averaged Navier-Stokes (RANS) equation is use
 d for the inner layer\, while the large eddy simulation (LES) is used for 
 the outer layer. The transition from the inner layer solution to the outer
  layer is often problematic due to lacking small scale dynamics in the RAN
 S region. In this paper we propose to simulate the whole flow region by la
 rge eddy simulation while enforcing a RANS Reynolds stress for the inner l
 ayer. We verifed our approach by simulating three-dimensional turbulent ch
 annel flows. We were able to accurately model the mean velocity and the tu
 rbulent stress using the same grid size as DES. The application of the pro
 posed constrained LES to other turbulent flows with separation will also b
 e discussed. 
LOCATION:Seminar Room 1\, Newton Institute
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