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Maintenance of the Near-Wall Cycle of Turbulence for Hybrid RANS/LES of Fully-Developed Channel Flow
| Content Provider | Semantic Scholar |
|---|---|
| Author | Peltier, Leonard Joel Zajaczkowski, Frank J. |
| Copyright Year | 2001 |
| Abstract | Abstract : Hybrid RANS/LES modeling of near-wall turbulence is investigated for fully-developed turbulent channel flow under very coarse resolution, a resolution not resolving the longitudinal eddies of the buffer layer in near-wall flow but not coarse enough to encompass an "effective" ensemble of eddies to give RANS. Without bursting from the buffer layer, the partially-resolved turbulence is suppressed. We model the effects of the buffer-layer eddies using a field of white noise and show that the core flow is able to extract energy from these artificial fluctuations to organize turbulence eddies that maintain a physical turbulence mixing. Results for Re% 640, based on the channel half-height and on the friction velocity, are presented. Mean-velocity and root-mean-square statistics are compared to results from higher resolution simulations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.dtic.mil/dtic/tr/fulltext/u2/p013707.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
