Abstract
Several hybrid LES/RANS (LES - Large-Eddy Simulation; RANS - Reynolds- Averaged Navier-Stokes) models have been assessed in computations of separated flows over smooth-contoured, wall-mounted hills, including flow control. The models considered include DES (Detached Eddy Simulation; Spalart et al. 1997, Travin et al. 2002), DDES (Delayed DES; Spalart et al. 2006), a zonal hybrid LES/RANS scheme (HLR; Jakirlic et al. 2006) and an Instability-Sensitized (IS) k-ε model. We report on models performance in the two configurations: periodic flow over a symmetric 2-D hill at moderate Reynolds number (Re b =10595; LES: Fröhlich et al.,2005; Breuer et al., 2005) and flow over a 2-D hump at high Re number( Re c ≈ 106,Exp.: Greenblatt et al., 2004). In the latter case the separation was controlled by steady suction through a narrow opening at the natural separation line in addition to the baseline flow. The computational results obtained confirm a crucial role of the LES/RANS interface treatment.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Breuer, M., et al.: A comparative study of the turbulent flow over a periodic arrangement of smoothly contoured hills. In: 6th ERCOFTAC Workshop on Direct and Large-Eddy Simulation - DLES6, Poitiers, France, September 12–14 (2005)
Fröhlich, J., et al.: Highly resolved large-eddy simulation of separated flow in a channel with streamwise periodic constrictions. J. Fluid Mech. 526, 19–66 (2005)
Greenblatt, D., et al.: A separation control CFD validation test case. Part 1: Baseline and steady suction, AIAA Paper No. 2004-2220 (2004)
Jakirlic, S., Jester-Zürker, R., Tropea, C.: Report on 9th ERCOFTAC/IAHR/ COST Workshop on Refined Turbulence Modelling. October 9–10, 2001, Darmstadt University of Technology, ERCOFTAC Bulletin, No. 55, pp. 36–43 (2002)
Jakirlic, S., Hanjalic, K.: A new approach to modelling near-wall turbulence energy and stress dissipation. J. Fluid Mech. 539, 139–166 (2002)
Jakirlić, S., et al.: Merging near-wall RANS models with LES for separating and reattaching flows. In: ASME Joint U.S.-European Fluids Engineering Summer Meeting: Symposium on “DNS, LES and Hybrid RANS/LES Techniques”, Miami, FL, USA, July 17–20, Paper No. FEDSM2006-98039 (2006)
Kniesner, B., et al.: Wall treatment in LES by RANS: Method development and application to aerodynamic flows and swirl combustors. ERCOFTAC Bulletin (72), 33–40 (2007)
Launder, B.E., Sharma, B.I.: Application of the Energy-Dissipation Model of Turbulence to the Calculation of Flow Near a Spinning Disc. Letters in Heat and Mass Transfer 1, 131–138 (1974)
Manceau, R., et al. (eds.): 10th Joint ERCOFTAC (SIG-15)/IAHR/QNET-CFD Workshop on Refined Flow Modelling, Universite de Poitiers, France, October 10–11 (2002)
Mason, P.J., Callen, N.S.: On the magnitude of the subgrid-scale eddy coefficient in large-eddy simulation of turbulent channel flow. J. Fluid Mech. 162, 439–462 (1986)
Menter, F.R., Egorov, Y.: Revisiting the turbulent scale equation. In: IUTAM Symposium on One Hundred Years of Boundary Layer Research, Göttingen, August 12–14 (2004)
Menter, F.R., Egorov, Y., Rusch, D.: Steady and unsteady flow modelling using the k-k1/2L model. In: Hanjalic, et al. (eds.) 5th Int. Symposium on Turbulence, Heat and Mass Transfer, Dubrovnik, Croatia, September 25–29, Begell House Inc. (2006)
Šarić, S., et al.: Computational analysis of locally forced flow over a wall-mounted hump at high-Re number. Int. J. of Heat and Fluid Flow 27(4), 707–720 (2006)
Spalart, P.R., et al.: Comments on the feasibility of LES for wings and on a hybrid RANS/LES approach. 1st AFOSR Int. Conf. on DNS and LES (1997)
Spalart, P.R., et al.: A new version of detached-eddy simulation, resistant to ambiguous grid densities. Theor. Comput. Fluid Dyn. 20, 181–195 (2006)
Temmerman, L., et al.: A hybrid two-layer URANS-LES approach for large eddy simulation at high Reynolds numbers. Int. J. Heat and Fluid Flow 26, 173–190 (2005)
Travin, A., et al.: Physical and numerical upgrades in the Detached-Eddy Simulation of complex turbulent flows. In: Friedrich, Rodi (eds.) Fluid Mechanics and Its Application, vol. 65, pp. 239–254 (2002)
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2008 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Šarić, S., Kniesner, B., Mehdizadeh, A., Jakirlić, S., Hanjalić, K., Tropea, C. (2008). Comparative Assessment of Hybrid LES/RANS Models in Turbulent Flows Separating from Smooth Surfaces. In: Peng, SH., Haase, W. (eds) Advances in Hybrid RANS-LES Modelling. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 97. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77815-8_15
Download citation
DOI: https://doi.org/10.1007/978-3-540-77815-8_15
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-77813-4
Online ISBN: 978-3-540-77815-8
eBook Packages: EngineeringEngineering (R0)