Influence of Rough Surface Morphology on Boundary Layer Flow

0549418 - ÚT 2022 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Jurčáková, Klára - Procházka, Pavel P. - Kellnerová, Radka - Antoš, Pavel - Skála, Vladislav
Influence of Rough Surface Morphology on Boundary Layer Flow.
Progress in Turbulence IX. Cham: Springer, 2021 - (Örlü, R.; Talamelli, A.; Peinke, j.; Oberlack, M.), s. 187-193. Springer Proceedings in Physics. ISBN 978-3-030-80715-3. ISSN 0930-8989. E-ISSN 1867-4941.
[iTi Conference on Turbulence /9./. on-line (CH), 25.02.2021-26.02.2021]
Grant CEP: GA ČR(CZ) GA18-09539S
Institucionální podpora: RVO:61388998
Klíčová slova: wind tunnel * hot-wire anemometry * turbulence intensity * roughness function
Obor OECD: Mechanical engineering
https://link.springer.com/chapter/10.1007%2F978-3-030-80716-0_25

The flow over nine different surfaces with sharp-edged roughness elements were measured by single wire anemometry. The intensity of turbulence did increase with the plan/frontal solidity of the roughness elements. We used a diagnostic plot to assess the quality of boundary-layer flows. All investigated boundary layers revealed linear dependence of the turbulence intensity on the relative mean wind speed in the outer layer. The slope of the diagnostic plot was dependent on the frontal solidity of the elements but not on their size. The intensity of turbulence exceeds the maximal slope of the diagnostic plot for rough-wall flows showed in (J. Fluid Mech.727:119–131) in six cases.
Trvalý link: http://hdl.handle.net/11104/0329112