| Title: |
The vertical-velocity skewness in the inertial sublayer of turbulent wall flows |
| Authors: |
Buono E.; Katul G.; Heisel M.; Vettori D.; Poggi D.; Peruzzi C.; Manes C. |
| Contributors: |
Buono, E.; Katul, G.; Heisel, M.; Vettori, D.; Poggi, D.; Peruzzi, C.; Manes, C. |
| Publisher Information: |
CAMBRIDGE UNIV PRESS |
| Publication Year: |
2024 |
| Collection: |
PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino) |
| Subject Terms: |
turbulent boundary layers |
| Description: |
Empirical evidence is provided that within the inertial sublayer (i.e. logarithmic region) of adiabatic turbulent flows over smooth walls, the skewness of the vertical-velocity component $S_w$ displays universal behaviour, being a positive constant and constrained within the range $S_w \approx 0.1\unicode{x2013}0.16$, regardless of flow configuration and Reynolds number. A theoretical model is then proposed to explain this behaviour, including the observed range of variations of $S_w$. The proposed model clarifies why $S_w$ cannot be predicted from down-gradient closure approximations routinely employed in large-scale meteorological and climate models. The proposed model also offers an alternative and implementable approach for such large-scale models. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:001378849900001; volume:1001; numberofpages:11; journal:JOURNAL OF FLUID MECHANICS; https://hdl.handle.net/11583/2996322 |
| DOI: |
10.1017/jfm.2024.975 |
| Availability: |
https://hdl.handle.net/11583/2996322; https://doi.org/10.1017/jfm.2024.975; https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/verticalvelocity-skewness-in-the-inertial-sublayer-of-turbulent-wall-flows/456CEE1BC696C8B28BEF920CC0365FC8 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.FABA5ADC |
| Database: |
BASE |