caa a22 4500 606198431 CHVBK 20210128100934.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00348-015-2024-5 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2024-5 On the calculation of boundary-layer parameters from discrete data [Elektronische Daten] [Neil Titchener, Simon Colliss, Holger Babinsky] 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. Springer-Verlag Berlin Heidelberg, 2015 Titchener Neil 77 Massachusetts Ave., Building 31-261C, 02139, Cambridge, MA, USA aut Colliss Simon Department of Engineering, University of Cambridge, Trumpington St., CB2 1PZ, Cambridge, UK aut Babinsky Holger Department of Engineering, University of Cambridge, Trumpington St., CB2 1PZ, Cambridge, UK aut Experiments in Fluids Springer Berlin Heidelberg 56/8(2015-08-01), 1-18 0723-4864 56:8<1 2015 56 348 https://doi.org/10.1007/s00348-015-2024-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-2024-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Titchener Neil 77 Massachusetts Ave., Building 31-261C, 02139, Cambridge, MA, USA aut NATIONALLICENCE 700 1- Colliss Simon Department of Engineering, University of Cambridge, Trumpington St., CB2 1PZ, Cambridge, UK aut NATIONALLICENCE 700 1- Babinsky Holger Department of Engineering, University of Cambridge, Trumpington St., CB2 1PZ, Cambridge, UK aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/8(2015-08-01), 1-18 0723-4864 56:8<1 2015 56 348