On the calculation of boundary-layer parameters from discrete data
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348_2015_2024_ReferencePDF.pdf
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Author(s)
Colliss, Simon
Babinsky, Holger
Titchener, Neil A
Date Issued
July 2015
Journal
Experiments in Fluids
Publisher
Springer Berlin Heidelberg
Citation
Titchener, Neil, Simon Colliss, and Holger Babinsky. “On the Calculation of Boundary-Layer Parameters from Discrete Data.” Experiments in Fluids 56.8 (2015): n. pag.
Version
Author's final manuscript
Abstract
An investigation of the errors inherent in the calculation of integral boundary-layer parameters from discrete datasets has been carried out. The primary errors examined were those due to discretization of the velocity profile, distance of the first data location from the wall, and uncertainty in the floor location. A range of turbulent velocity profiles with different shape factors from analytical models and published DNS investigations has been examined. This analysis demonstrates that the spacing of the first measurement point from the floor is by far the most critical error source. Furthermore, the error is shown to be a function of boundary-layer shape factor, and therefore, a correction factor chart has been derived. Two alternative methods of estimating integral boundary-layer parameters have been examined: wall modeling and a gradient-based formulation. These have both been shown to generate smaller errors than the basic integration approach, although both are susceptible to external influences.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s00348-015-2024-5
