

Article
Turbulent boundary layers in long computational domains
Authors: 
Schlatter, P., Li, Q., Örlü, R., Brethouwer, G.B., Johansson, A.V.J., Alfredsson, P.H., Henningson, D.S.H. 
Document Type: 
Conference 
Pubstate: 
Published 
Journal: 
Bulletin of the American Physical Society, 64rd Annual Meeting of the APS Division of Fluid Dynamics, November 20–22, 2011, Baltimore, Maryland 
Volume: 
56

Year: 
2011 
AbstractA new series of numerical simulations of spatially evolving turbulent boundary layers is discussed. The very long computational domain starts at a low $Re_\theta=180$, where laminarturbulent transition is initiated, reaching up to the (computationally very) high $Re_\theta=8500$. In the domain, the boundary layer develops naturally from the tripping location to the higher Reynolds numbers without any reinjection or recycling procedures. In consequence, this computational setup allows us to study, e.g., the mean flow development and the scaling behavior of the fluctuating energy free from pseudoperiodic effects. However, such domains require a large number of grid points; in the present case up to 10 billion for running wellresolved largeeddy simulation. The present results show excellent agreement with windtunnel experiments at similar $Re$ and previous (lower$Re$) simulations (both direct and large eddy simulations). The mean velocity profiles closely follow the correlation proposed by Monkewitz et al. (2007), just about reaching the plateau in the loglaw diagnostic function. In a second part, threedimensional visualizations of the evolving turbulent boundary layer are discussed with special focus on the persistence of transitional flow structures towards higher Reynolds numbers, having a highly unordered appearance. http://meetings.aps.org/link/BAPS.2011.DFD.G7.9

