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Les: Where Are We and What Can We Expect*
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jiménez, Javier Moser, Robert D. |
| Copyright Year | 1998 |
| Abstract | Recent subgrid models for LES of turbulent flows are evaluated, particularly the dynamic-Smagorinsky combination, with emphasis on identifying the reasons for their success and the limits of their applicability. It is argued that they reproduce the turbulent dissipation relatively well, but that their main advantage is that they are robust to errors, in that they have a built-in mechanism to adjust the dissipation without substantially modifying the larger scales. The question of the stresses is considered next. It is found that it is an intrinsic property of subgrid models that the stresses are essentially unpredictable, and the models considered are indeed found not to reproduce them correctly, even on the average. This is traced to the incorrect stress-strain correlation of eddy-viscosity models. Mean stresses are however large-scale quantities which are carried by the resolved structures if the resolution is fine enough. Explicit limits are given. |
| File Format | PDF HTM / HTML |
| DOI | 10.2514/6.1998-2891 |
| Alternate Webpage(s) | https://torroja.dmt.upm.es/pubs/2000/JimMos_AIAAJ2000.pdf |
| Alternate Webpage(s) | https://doi.org/10.2514/6.1998-2891 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
