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LES of the adverse-pressure gradient turbulent boundary layer

Inoue, M. and Pullin, D. I. and Harun, Z. and Marusic, I. (2013) LES of the adverse-pressure gradient turbulent boundary layer. International Journal of Heat and Fluid Flow, 44 . pp. 293-300. ISSN 0142-727X . http://resolver.caltech.edu/CaltechAUTHORS:20140206-103338989

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Abstract

We describe large-eddy simulations (LES) of the flat-plate turbulent boundary layer in the presence of an adverse pressure gradient. The stretched-vortex subgrid-scale model is used in the domain of the flow coupled to a wall model that explicitly accounts for the presence of a finite pressure gradient. The LES are designed to match recent experiments conducted at the University of Melbourne wind tunnel where a plate section with zero pressure gradient is followed by section with constant adverse pressure gradient. First, LES are described at Reynolds numbers based on the local free-stream velocity and the local momentum thickness in the range 6560–13,900 chosen to match the experimental conditions. This is followed by a discussion of further LES at Reynolds numbers at approximately 10 times and 100 times these values, which are well out of range of present day direct numerical simulation and wall-resolved LES. For the lower Reynolds number runs, mean velocity profiles, one-point turbulent statistics of the velocity fluctuations, skin friction and the Clauser and acceleration parameters along the streamwise, adverse pressure-gradient domain are compared to the experimental measurements. For the full range of LES, the relationship of the skin-friction coefficient, in the form of the ratio of the local free-stream velocity to the local friction velocity, to both Reynolds number and the Clauser parameter is explored. At large Reynolds numbers, a region of collapse is found that is well described by a simple log-like empirical relationship over two orders of magnitude. This is expected to be useful for constant adverse-pressure gradient flows. It is concluded that the present adverse pressure gradient boundary layers are far from an equilibrium state.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.ijheatfluidflow.2013.06.011 DOIArticle
http://www.sciencedirect.com/science/article/pii/S0142727X13001410PublisherArticle
Additional Information:© 2013 Elsevier Inc. Received 7 July 2012; Received in revised form 30 March 2013; Accepted 23 June 2013; Available online 27 July 2013. This work has been supported in part by the National Science Foundation under Grant CBET-1235605. DIP also acknowledges travel support of the Australian Research Council.
Group:GALCIT
Funders:
Funding AgencyGrant Number
NSFCBET-1235605
Australian Research Council (ARC)UNSPECIFIED
Subject Keywords:Adverse pressure gradient; Turbulent boundary layer; Wall-model LES
Record Number:CaltechAUTHORS:20140206-103338989
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140206-103338989
Official Citation:M. Inoue, D.I. Pullin, Z. Harun, I. Marusic, LES of the adverse-pressure gradient turbulent boundary layer, International Journal of Heat and Fluid Flow, Volume 44, December 2013, Pages 293-300, ISSN 0142-727X, http://dx.doi.org/10.1016/j.ijheatfluidflow.2013.06.011. (http://www.sciencedirect.com/science/article/pii/S0142727X13001410)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43697
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Feb 2014 21:44
Last Modified:21 Sep 2016 22:36

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