An Extended View of the Inner-outer Interaction Model for Wall-bounded Turbulence Using Spectral Linear Stochastic Estimation

Marusic, I, Baars, W and Hutchins, N 2015, 'An Extended View of the Inner-outer Interaction Model for Wall-bounded Turbulence Using Spectral Linear Stochastic Estimation', in Jiachun Li & Jing Fan (ed.) Proceedings of the 7th International Conference on Fluid Mechanics (ICFM 2015), Qingdao, China, 24-27 May 2015, pp. 24-28.


Document type: Conference Paper
Collection: Conference Papers

Title An Extended View of the Inner-outer Interaction Model for Wall-bounded Turbulence Using Spectral Linear Stochastic Estimation
Author(s) Marusic, I
Baars, W
Hutchins, N
Year 2015
Conference name ICFM 2015
Conference location Qingdao, China
Conference dates 24-27 May 2015
Proceedings title Proceedings of the 7th International Conference on Fluid Mechanics (ICFM 2015)
Editor(s) Jiachun Li & Jing Fan
Publisher Elsevier BV
Place of publication Netherlands
Start page 24
End page 28
Total pages 5
Abstract Streamwise velocity fluctuations in the inner-region of wall-bounded turbulent flows can be predicted by the model of Marusic, Mathis & Hutchins (2010). Only a single large-scale velocity signal from an outer position in the logarithmic region is needed for the model, and all other parameters are determined from a once-off calibration experiment. Here we elucidate part of the model by investigating the scale-dependent coherence magnitude and phase throughout the boundary layer. The collection of coherent scales exhibits a shift with respect to the reference position that is shown to be independent of scale; thus the large-scales are non-dispersive. Because these scales comprise a strong coherence, their signature in the inner-region is predicted from an input signal acquired at the geometric center of the log-region. Previously this was achieved via single-time stochastic estimation. Here we leverage the inherent advantages of spectral linear stochastic estimation for the prediction of these large-scales.
Subjects Aerodynamics (excl. Hypersonic Aerodynamics)
Keyword(s) wall-turbulencecoherent structuresscale-interactionlinear stochastic estimation
DOI - identifier 10.1016/j.proeng.2015.11.171
Copyright notice © 2015 The Authors. Creative Commons License CC BY-NC-ND 4.0
ISSN 1877-7058
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