A revisit of the electro-diffusional theory for the wall shear stress measurement.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F21%3A00534262" target="_blank" >RIV/67985858:_____/21:00534262 - isvavai.cz</a>
Alternative codes found
RIV/44555601:13440/21:43896857
Result on the web
<a href="http://hdl.handle.net/11104/0313721" target="_blank" >http://hdl.handle.net/11104/0313721</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.120610" target="_blank" >10.1016/j.ijheatmasstransfer.2020.120610</a>
Alternative languages
Result language
angličtina
Original language name
A revisit of the electro-diffusional theory for the wall shear stress measurement.
Original language description
This article intends to revisit the electro-diffusional theory for the wall shear stress measurement from mass transfer probes of rectangular shape by considering the existence of two components of the wall shear rate (i.e., axial and transversal). General analytical formulas for the effective transf er length and the dimensionless mass transport coefficient were derived as a function of two parameters: a dimensionless angle of the flow direction, relative to the leading edge of the probe, and the aspect ratio between the width and the length of the strip probe. The correctness of the analytical relations for arbitrary flow direction and the aspect ratio was confirmed by numerical solutions of the transport equation in the convective-diffusive regime. It has also been proved that the differences between the Lévêque solution and the general analytical formula exhibit a significant deviation for a specific range of parameters. In the case of the three-dimensional boundary layers, in addition to the magnitude of the wall shear stress, the direction of the fluid flow in the vicinity of the probe’s surface is of paramount importance. Accordingly, a measurement methodology is proposed using two strip probes with different aspect ratios. The resulting equations required to quantify the magnitude of the wall shear rate vector and the dimensionless angle are also derived.
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
20402 - Chemical process engineering
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Heat and Mass Transfer
ISSN
0017-9310
e-ISSN
1879-2189
Volume of the periodical
165
Issue of the periodical within the volume
Feb 2021
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
120610
UT code for WoS article
000596069900009
EID of the result in the Scopus database
2-s2.0-85095706744