Velocity profiles of fluid flow close to a hydrophobic surface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F17%3APU140236" target="_blank" >RIV/00216305:26210/17:PU140236 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/17:00004645

Výsledek na webu

<a href="https://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02023/epjconf_efm2017_02023.html" target="_blank" >https://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02023/epjconf_efm2017_02023.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/201714302023" target="_blank" >10.1051/epjconf/201714302023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Velocity profiles of fluid flow close to a hydrophobic surface

Popis výsledku v původním jazyce

The results of research on viscous liquid flow upon a superhydrophobic surface are presented in the paper. In the introduction, the degrees of surface hydrophobicity in correlation with an adhesion coefficient are defined. The usage of the adhesion coefficient for the definition of a new boundary condition is employed for expressing the slip of the liquid over the superhydrophobic surface. The slip of the liquid was identified on a special experimental device. The essence of the device consists of a tunnel of rectangular cross section whose one wall is treated with a superhydrophobic layer. The other walls are made of transparent organic glass whose surface is hydrophilic. Velocity profiles are measured by PIV. The methodology is drawn so that it allows the speed determination at the closest point to the wall. The measurements were performed for different Reynolds numbers for both laminar and turbulent flow. Based on the measured velocity profiles, marginal terms of use have been verified, expressing slippage of the liquid on the wall. New forms of velocity profiles considering superhydrophobic surfaces are shown within the work.

Název v anglickém jazyce

Velocity profiles of fluid flow close to a hydrophobic surface

Popis výsledku anglicky

The results of research on viscous liquid flow upon a superhydrophobic surface are presented in the paper. In the introduction, the degrees of surface hydrophobicity in correlation with an adhesion coefficient are defined. The usage of the adhesion coefficient for the definition of a new boundary condition is employed for expressing the slip of the liquid over the superhydrophobic surface. The slip of the liquid was identified on a special experimental device. The essence of the device consists of a tunnel of rectangular cross section whose one wall is treated with a superhydrophobic layer. The other walls are made of transparent organic glass whose surface is hydrophilic. Velocity profiles are measured by PIV. The methodology is drawn so that it allows the speed determination at the closest point to the wall. The measurements were performed for different Reynolds numbers for both laminar and turbulent flow. Based on the measured velocity profiles, marginal terms of use have been verified, expressing slippage of the liquid on the wall. New forms of velocity profiles considering superhydrophobic surfaces are shown within the work.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/GA16-18316S" target="_blank" >GA16-18316S: Principy a mechanismy eliminace mikroorganismů hydrodynamickou kavitací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

EFM16 – Experimental Fluid Mechanics 2016

ISBN

—

ISSN

2100-014X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Mariánské lázně

Datum konání akce

15. 11. 2016

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

000407743800025