Abstract
To study the effect of free-stream fluctuations on laminar flow separation a series of Direct Numerical Simulations (DNS) is performed. The three largest computations have been carried out on the Hitachi SR8000 F1 at the Leibniz Computing Centre (LRZ) in Munich using 256 processors. The level of the free-stream disturbances in the oncoming flow is found to have a significant impact on the size of the Laminar Separation Bubble (LSB). Downstream of the separation bubble, the near wall turbulent flow is found to only slowly assume the ”normal” characteristics of a turbulent boundary layer.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Alam, M., Sandham, N.D.: Direct numerical simulation of 'short’ laminar separation bubbles with turbulent reattachment, J. Fluid Mech., 410, 1–28, (2000).
Breuer, M., Rodi, W.: Large eddy simulation of complex turbulent flows of practical interest, Flow Simulation with High Performance Computers II, Notes on Num. Fluid Mechanics, Vieweg Verlag, (1996).
Leblanc, S., Cambon, C.: Effects of the Coriolis force on the stability of Stuart Vortices. J. Fluid Mech., 356, 353–379 (1998).
Lou, W., Hourmouziadis, J.: Separation under steady and periodic unsteady main flow conditions. In: Proceedings of the 45th ASME International Gas Turbine & Aeroengine Technical Congress, Munich Germany, (2000).
Mason, D.M., Kerswell, R.R.: Nonlinear evolution of the elliptic instability: an example of inertial wave breakdown. J. Fluid Mech., 396, 73–108 (1999).
Maucher, U., Rist U., Kloker, M., Wagner, S.: DNS of laminar-turbulent transition in separation bubbles. In: Krause, E., Jäger, W. (eds) High-Performance Computing in Science and Engineering. Springer Berlin Heidelberg (2000).
Maucher, U., Rist U., Kloker, M., Wagner, S.: Secondary disturbance amplification and transition in laminar separation bubbles. In: Proceedings IUTAM-symposium Laminar-Turbulent Transition, Sedona, Az. (1999).
Pradeep, D.S., Hussain, F.: Core-dynamics of a strained vortex: instability and transition. J. Fluid Mech., 447, 247–285 (2001).
Spalart, P.R., Strelets, M.Kh.: Mechanisms of transition and heat transfer in a separation bubble, J. Fluid Mech., 403, 329–349 (2000).
Rhie, C.M., Chow, W.L.: Numerical Study of the Turbulent Flow Past an Airfoil with Trailing Edge Separation, AIAA J., 21, 1525–1532 (1983).
Wissink, J.G., Rodi, W.: DNS of Transition in a Laminar Separation Bubble, In: I.P. Castro and P.E. Hancock (eds.), Advances in Turbulence IX, Proceedings of the Ninth European Turbulence Conference, 727–730 (2002).
Wissink, J.G., Rodi, W.: DNS of transition in periodic, unsteady flow, M. Savill (ed.), ERCOFTAC Bulletin, 54, (2002).
Wissink, J.G., Rodi, W.: DNS of a laminar separation bubble in the presence of oscillating flow, Flow, Turbulence and Combustion, in print, (2003).
Wissink, J.G., Rodi, W.: Direct numerical simulation of boundary layer separation along a curved wall with oscillating oncoming flow, In: S. Wagner, W. Hanke, A. Bode, F. Durst (eds.), High Performance Computing in Science and Engineering Munich 2002, 113–123 (2003).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Wissink, J., Rodi, W. (2005). Boundary Layer Separation Influenced by Free-Stream Disturbances. In: Wagner, S., Hanke, W., Bode, A., Durst, F. (eds) High Performance Computing in Science and Engineering, Munich 2004. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26657-7_13
Download citation
DOI: https://doi.org/10.1007/3-540-26657-7_13
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-44326-1
Online ISBN: 978-3-540-26657-0
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)