ISSN:
1573-7691
Keywords:
Large eddy simulation
;
Reynolds average
;
turbulence model
;
compressible flow
;
Reynolds stress
Source:
Springer Online Journal Archives 1860-2000
Topics:
Computer Science
Notes:
Abstract An entirely new approach to the large-eddy simulation (LES) of high-speed compressible turbulent flows is presented. Subgrid scale stress models are proposed that are dimensionless functions of the computational mesh size times a Reynolds stress model. This allows a DNS to go continuously to an LES and then a Reynolds-averaged Navier–Stokes (RANS) computation as the mesh becomes successively more coarse or the Reynolds number becomes much larger. Here, the level of discretization is parameterized by the nondimensional ratio of the computational mesh size to the Kolmogorov length scale. The Reynolds stress model is based on a state-of-the-art two-equation model whose enhanced performance is documented in detail in a variety of benchmark flows. It contains many of the most recent advances in compressible turbulence modeling. Applications to the high-speed aerodynamic flows of technological importance are briefly discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1023266932231
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