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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

  • Czech description

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