Experiments and computations of localized pressure gradients with different history effects
Vinuesa R, Rozier PH, Schlatter P, Nagib HM (2014)
Publication Type: Journal article
Publication year: 2014
Journal
Book Volume: 52
Pages Range: 368-384
Journal Issue: 2
DOI: 10.2514/1.J052516
Abstract
The study of high-Reynolds-number wall-bounded turbulent flows has become a very active area of research in the past decade, where several recent results have challenged current understanding. In this study, four different localized pressure gradient configurations are characterized by computing them using four Reynolds-averaged Navier-Stokes turbulence models (Spalart-Allmaras, κ-ε, shear stress transport, and the Reynolds stress model) and comparing their predictions with experimental measurements of mean flow quantities and wall shear stress. The pressure gradients were imposed on high-Reynolds-number, two-dimensional turbulent boundary layers developing on a flat plate by changing the ceiling geometry of the test section. The computations showed that the shear stress transport model produced the best agreement with the experiments. It was found that what is called "numerical transition" (a procedure by which the laminar boundary conditions are transformed into inflow conditions to characterize the initial turbulent profile) causes the major differences between the various models, thereby highlighting the need for models representative of true transition in computational codes. Also, both experiments and computations confirm the nonuniversality of the von Kármán coefficient κ. Finally, a procedure is demonstrated for simpler two-dimensional computations that can be representative of flows with some mild three-dimensional geometries. Copyright © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Authors with CRIS profile
Involved external institutions
Indian Institute of Technology (IIT) Gandhinagar
India (IN)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
India (IN)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
How to cite
APA:
Vinuesa, R., Rozier, P.H., Schlatter, P., & Nagib, H.M. (2014). Experiments and computations of localized pressure gradients with different history effects. AIAA Journal, 52(2), 368-384. https://doi.org/10.2514/1.J052516
MLA:
Vinuesa, Ricardo, et al. "Experiments and computations of localized pressure gradients with different history effects." AIAA Journal 52.2 (2014): 368-384.
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