Mutable bubble surface mobility in water – propanol mixtures and its impact on bubble motion and deformation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F22%3A00559117" target="_blank" >RIV/67985858:_____/22:00559117 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/22:43924754

Výsledek na webu

<a href="https://hdl.handle.net/11104/0332539" target="_blank" >https://hdl.handle.net/11104/0332539</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2022.117861" target="_blank" >10.1016/j.ces.2022.117861</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mutable bubble surface mobility in water – propanol mixtures and its impact on bubble motion and deformation

Popis výsledku v původním jazyce

Various anomalies are typical for aqueous solutions of simple alcohols, with viscosity maxima and changing bubble surface mobility being significant for multiphase systems. Three regions of the hydrodynamic behaviour of spherical and ellipsoidal bubbles are described, depending on the propanol concentration. At low concentration (Xp ≤ 0.005), alcohol behaves as a surfactant and the increase in concentration increases the drag coefficient and decreases bubble deformation. At intermediate concentration, the increase of concentration leads to more deformed bubbles with increasing rise velocity, because of the advantage of formation of bulk clusters. At high concentration (Xp ≥ 0.07), bubbles behave as fully mobile with a low drag coefficient. Because of the fast desorption of molecules from the bubble surface, neither a concentration gradient nor a surface tension gradient arises, and thus the conditions for bubble surface mobility are fulfilled. The transition in the hydrodynamic behaviour is evident for all bubble sizes.

Název v anglickém jazyce

Mutable bubble surface mobility in water – propanol mixtures and its impact on bubble motion and deformation

Popis výsledku anglicky

Various anomalies are typical for aqueous solutions of simple alcohols, with viscosity maxima and changing bubble surface mobility being significant for multiphase systems. Three regions of the hydrodynamic behaviour of spherical and ellipsoidal bubbles are described, depending on the propanol concentration. At low concentration (Xp ≤ 0.005), alcohol behaves as a surfactant and the increase in concentration increases the drag coefficient and decreases bubble deformation. At intermediate concentration, the increase of concentration leads to more deformed bubbles with increasing rise velocity, because of the advantage of formation of bulk clusters. At high concentration (Xp ≥ 0.07), bubbles behave as fully mobile with a low drag coefficient. Because of the fast desorption of molecules from the bubble surface, neither a concentration gradient nor a surface tension gradient arises, and thus the conditions for bubble surface mobility are fulfilled. The transition in the hydrodynamic behaviour is evident for all bubble sizes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/GA19-09518S" target="_blank" >GA19-09518S: Dynamika nestacionárních dějů v plyno-kapalinových soustavách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

1873-4405

Svazek periodika

260

Číslo periodika v rámci svazku

12 October

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

117861

Kód UT WoS článku

000830823900001

EID výsledku v databázi Scopus

2-s2.0-85134356673