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Investigation of the law-of-the-wall for a turbulent boundary layer flow at adverse pressure gradient at Reθ up to 10000 using large-scale PIV

Knopp, Tobias and Schanz, Daniel and Schröder, Andreas and Hain, Rainer and Kähler, Christian (2013) Investigation of the law-of-the-wall for a turbulent boundary layer flow at adverse pressure gradient at Reθ up to 10000 using large-scale PIV. International Symposium on Turbulence and Shear Flow Phenomena (TSFP-8), 28. - 30. Aug. 2013 , Poitiers, France.

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Official URL: http://tsfp8.pprime.fr/

Abstract

We present an experimental investigation and data analysis of a turbulent boundary layer flow at a significant adverse pressure gradient at Reynolds number Reθ = 10000 using large field PIV. The aim is to find a wall-law for the mean-velocity in the inner layer. We consider scaling law diagnostic functions together with the Millikan argument. The inner part can be fitted by the log-law, but is progressively reduced. In the outer part, the overlap layer, the loglaw ceases to be valid. Instead, a modified log-law gives a good fit, which needs as parameters the pressure gradient parameter and the mean inertial effects. We then attempt to find a quantitative description which is local in wall-normal direction without streamwise history effects.

Item URL in elib:https://elib.dlr.de/85017/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of the law-of-the-wall for a turbulent boundary layer flow at adverse pressure gradient at Reθ up to 10000 using large-scale PIV
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knopp, Tobiastobias.knopp (at) dlr.deUNSPECIFIED
Schanz, DanielUNSPECIFIEDUNSPECIFIED
Schröder, AndreasUNSPECIFIEDUNSPECIFIED
Hain, RainerUni BW München, Inst f Strömungsmechanik und AerodynamikUNSPECIFIED
Kähler, ChristianUniBw MünchenUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-6
Series Name:Conference Proceedings online
Status:Published
Keywords:turbulent boundary layer flow, PIV
Event Title:International Symposium on Turbulence and Shear Flow Phenomena (TSFP-8)
Event Location:Poitiers, France
Event Type:international Conference
Event Dates:28. - 30. Aug. 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Micknaus, Ilka
Deposited On:18 Nov 2013 16:43
Last Modified:08 May 2014 23:19

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