Secondary flow of second kind in a short channel observed by PIV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00517246" target="_blank" >RIV/61388998:_____/20:00517246 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23210/20:43957446
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0997754619304029" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0997754619304029</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.euromechflu.2019.10.005" target="_blank" >10.1016/j.euromechflu.2019.10.005</a>
Alternative languages
Result language
angličtina
Original language name
Secondary flow of second kind in a short channel observed by PIV
Original language description
By using the Stereo Particle Image Velocimetry (PIV) technique we observe the secondary flow of second kind in a corner of a channel of square cross-section. The boundary layer thickness is much lower than the channel size. Therefore, the flow is still developing, not filling the entire channel cross-section, which is the case more widely reported in literature studied in a very long channel. The non-linear secondary effects of interacting boundary layers are observed as a single stream-wise vortex close to the channel corner in case of laminar boundary layers. In the case of turbulent boundary layers, the secondary flow takes shape of a symmetric pair of counter-rotating vortices. This pattern is observable only in the average velocity field, while the instantaneous ones display large amount of vortices, whose spatial distribution close to the corner in dependence on their orientation leads to statistically emergent net vorticity. At the same time, this pattern is reproduced by using a numerical simulation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Journal of Mechanics B-Fluids
ISSN
0997-7546
e-ISSN
1873-7390
Volume of the periodical
79
Issue of the periodical within the volume
January
Country of publishing house
FR - FRANCE
Number of pages
10
Pages from-to
444-453
UT code for WoS article
000503315100038
EID of the result in the Scopus database
2-s2.0-85074360691