Assessing Quality of Boundary Layer Flows With the Diagnostic Plot
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00503340" target="_blank" >RIV/61388998:_____/19:00503340 - isvavai.cz</a>
Result on the web
<a href="http://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2019/15-TPFM2019.pdf" target="_blank" >http://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2019/15-TPFM2019.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.14311/TPFM.2019.015" target="_blank" >10.14311/TPFM.2019.015</a>
Alternative languages
Result language
angličtina
Original language name
Assessing Quality of Boundary Layer Flows With the Diagnostic Plot
Original language description
We experimentally investigated turbulent boundary layers over 4 rough surfaces and 1 smooth surface by particle image velocimetry for a range a free stream velocities. The obtained mean velocity vertical profiles were universally scaled by roughness length z₀ and friction velocity u*, but both parameters have to be obtained from the fit of the logarithmic or composite velocity pro le to the experimental data. Diagnostic plot, which relates turbulence intensity with the mean velocity showed good collapse of different free stream velocities for each surface. It became fully universal in its modified version when the roughness function was taken into an account. We found that turbulence intensities over our surfaces are higher than any published one and that they dependent on roughness length z₀*.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
<a href="/en/project/GA18-09539S" target="_blank" >GA18-09539S: Large structures in the boundary layers over complex surfaces in high Reynolds numbers</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of Topical Problems of Fluid Mechanics 2019
ISBN
978-80-87012-69-7
ISSN
2336-5781
e-ISSN
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Number of pages
8
Pages from-to
101-108
Publisher name
Institute of Thermomechanics of the Czech Academy of Sciences
Place of publication
Praha
Event location
Prague
Event date
Feb 20, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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