Flow field in a downward diverging channel and its application

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F16%3A86095903" target="_blank" >RIV/61989100:27350/16:86095903 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/16:86095903

Výsledek na webu

<a href="http://dx.doi.org/10.1515/chempap-2016-0044" target="_blank" >http://dx.doi.org/10.1515/chempap-2016-0044</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/chempap-2016-0044" target="_blank" >10.1515/chempap-2016-0044</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flow field in a downward diverging channel and its application

Popis výsledku v původním jazyce

The flow in a downward divergent channel turns out to be an interesting experimental setup for the observation of upward floating bubbles that appear to be levitating in view of the observer. A more detailed analysis of this flow and its characteristic parameters is necessary for better understanding of this phenomenon. The boundary layer theory was used to derive the velocity field for the experimental setup. The actual flow of a liquid in the presence of a bubble was studied experimentally by measuring the position of the bubble; the data were then statistically processed by an image analysis. Observation of the bubble positions distribution showed that it is reasonable to assume a flat velocity profile of the liquid in the channel and that the bubbles do not tend to move into the boundary layer. In our experiments, volume of the air bubbles floating in water was 200 mm(3) and of that of bubbles floating in aqueous glycerin was 300 mm(3). Thus, the experiment used in this work is suitable for reliable determination of instantaneous and average bubble rising velocities as well as of those of horizontal and vertical oscillations.

Název v anglickém jazyce

Flow field in a downward diverging channel and its application

Popis výsledku anglicky

The flow in a downward divergent channel turns out to be an interesting experimental setup for the observation of upward floating bubbles that appear to be levitating in view of the observer. A more detailed analysis of this flow and its characteristic parameters is necessary for better understanding of this phenomenon. The boundary layer theory was used to derive the velocity field for the experimental setup. The actual flow of a liquid in the presence of a bubble was studied experimentally by measuring the position of the bubble; the data were then statistically processed by an image analysis. Observation of the bubble positions distribution showed that it is reasonable to assume a flat velocity profile of the liquid in the channel and that the bubbles do not tend to move into the boundary layer. In our experiments, volume of the air bubbles floating in water was 200 mm(3) and of that of bubbles floating in aqueous glycerin was 300 mm(3). Thus, the experiment used in this work is suitable for reliable determination of instantaneous and average bubble rising velocities as well as of those of horizontal and vertical oscillations.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Chemical papers

ISSN

0366-6352

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

1106-1116

Kód UT WoS článku

000378421200011

EID výsledku v databázi Scopus

2-s2.0-84969850132