Busse, A. and Jelly, T. O. (2021) Wall-bounded Turbulence Over Highly Positively and Negatively Skewed Roughness. 25th International Congress of Theoretical and Applied Mechanics, 22-27 Aug 2021.
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Abstract
While most engineering rough surfaces have only moderately skewed height distributions, examples of irregular rough surfaces with very high positive or negative skewness are not unusual. In the current study, the fluid dynamic properties of a set of seven irregular rough surfaces with skewness varying from -2.3 to +2.3 are investigated using direct numerical simulations of turbulent channel flow. We observe that the roughness function saturates both for very high positive and very high negative skewness, showing that extrapolation of existing empirical correlations for moderate skewness will overpredict the roughness effect for extremely skewed cases.
Item Type: | Conference or Workshop Item |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Jelly, Mr Thomas and Busse, Professor Angela |
Authors: | Busse, A., and Jelly, T. O. |
College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
Copyright Holders: | Copyright © 2021 The Authors |
Publisher Policy: | Reproduced with the permission of the authors |
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