Large eddy simulation of subsonic and supersonic channel flow at moderate Reynolds number
✍ Scribed by E. Lenormand; P. Sagaut; L. Ta Phuoc
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 327 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0271-2091
No coin nor oath required. For personal study only.
✦ Synopsis
Large eddy simulation (LES) of compressible periodic channel flow is performed using a fourth-order finite difference scheme for a Reynolds number based on bulk density, bulk velocity and channel half-width equal to 3000. Two configurations are studied: a subsonic case (M 0 = 0.5) that corresponds to the experiments of Niederschulte et al. ['Measurements of turbulent flow in a channel at low Reynolds numbers ', Exp. Fluids, 9, 222-230 (1990)] and a supersonic case (M 0 = 1.5) that corresponds to the direct numerical simulation (DNS) results by Coleman et al. ['A numerical study of turbulent supersonic isothermal-wall channel flow ', J. Fluid Mech., 305, 159 -183 (1995); 'Compressible turbulent channel flows: DNS results and modeling ', J. Fluid Mech., 305, 185 -218 (1995)]. In order to determine the influence of the discretization, two cases are computed using two different meshes, a coarse one and a fine one. Two subgrid-scale models are tested: the first one is an extension to compressible flows of the Smagorinsky model, while the second one is a model based both on large and small scales of turbulence, a hybrid Bardina-selective mixed scale model. Various statistical comparisons are made with experimental and DNS data at similar Reynolds numbers, including higher-order statistics.