Alpha-modeling strategy for LES of turbulent mixing
| dc.creator | Geurts, Bernard J. | |
| dc.creator | Holm, Darryl D. | |
| dc.date | 2002-02-05 | |
| dc.date.accessioned | 2026-07-07T05:33:54Z | |
| dc.date.available | 2026-07-07T05:33:54Z | |
| dc.description | The $α$-modeling strategy is followed to derive a new subgrid parameterization of the turbulent stress tensor in large-eddy simulation (LES). The LES-$α$ modeling yields an explicitly filtered subgrid parameterization which contains the filtered nonlinear gradient model as well as a model which represents `Leray-regularization'. The LES-$α$ model is compared with similarity and eddy-viscosity models that also use the dynamic procedure. Numerical simulations of a turbulent mixing layer are performed using both a second order, and a fourth order accurate finite volume discretization. The Leray model emerges as the most accurate, robust and computationally efficient among the three LES-$α$ subgrid parameterizations for the turbulent mixing layer. The evolution of the resolved kinetic energy is analyzed and the various subgrid-model contributions to it are identified. By comparing LES-$α$ at different subgrid resolutions, an impression of finite volume discretization error dynamics is obtained. | |
| dc.description | 42 pages, 14 figures, to appear in `Turbulent Flow Computation', edited by D. Drikakis, B.J. Geurts, Kluwer Academic Publishers, 2002 | |
| dc.identifier | https://arxiv.org/abs/nlin/0202012 | |
| dc.identifier | http://arxiv.org/abs/nlin/0202012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/80164 | |
| dc.subject | Chaotic Dynamics | |
| dc.title | Alpha-modeling strategy for LES of turbulent mixing | |
| dc.type | text |