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dc.contributor.author | TOMINAGA, Akihiro | en |
dc.contributor.author | NEZU, Iehisa | en |
dc.date.accessioned | 2023-03-28T09:09:07Z | - |
dc.date.available | 2023-03-28T09:09:07Z | - |
dc.date.issued | 1991-07-31 | - |
dc.identifier.uri | http://hdl.handle.net/2433/281441 | - |
dc.description.abstract | Velocity measurement with a fiber-optic laser-Doppler anemometer were conducted in steep open-channel flows over smooth and incompletely rough beds. The channel slopes were changed between 1/500 and 1/25 by steps, and as a result, the Froude number changed from 0.5 to 3. The law of the wall and the distributions of turbulence intensity were examined in more detail. The von Kármán constant κ in the log law was verified to be unversally equal to 0.41. On the other hand, the integral constant A in the log law coincided with the usual value of 5.29 in subcritical flows, whereas it decreased with an increase of the bed slope in supercritical flows. This decrease of A was explained by a decrease of the damping factor B in the van Driest's mixing-length formula. The decrease of B was well correlated with an increase of the friction velocity and the roughness. The streamwise turbulence intensity became smaller in the near-wall region than the semi-empirical universal formula, as the friction velocity became larger. | en |
dc.language.iso | eng | - |
dc.publisher | Faculty of Engineering, Kyoto University | en |
dc.publisher.alternative | 京都大学工学部 | ja |
dc.subject.ndc | 500 | - |
dc.title | Turbulent Structure in Steep Open-Channel Flows | en |
dc.type | departmental bulletin paper | - |
dc.type.niitype | Departmental Bulletin Paper | - |
dc.identifier.ncid | AA00732503 | - |
dc.identifier.jtitle | Memoirs of the Faculty of Engineering, Kyoto University | en |
dc.identifier.volume | 53 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 151 | - |
dc.identifier.epage | 177 | - |
dc.textversion | publisher | - |
dc.sortkey | 06 | - |
dc.address | Department of Civil Engineering, Nagoya Institute of Technology | en |
dc.address | Division of Global Environment Engineering, Kyoto University | en |
dcterms.accessRights | open access | - |
dc.identifier.pissn | 0023-6063 | - |
出現コレクション: | Vol.53 Part 3 |
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