Collision of Bubbles with Solid Surface in the Presence of Specific Surfactants.

Kód výsledku v IS VaVaI

RIV/67985858:_____/21:00542379 - isvavai.cz

Nalezeny alternativní kódy

RIV/60461373:22340/21:43923123

Výsledek na webu

https://www.mdpi.com/2075-163X/11/5/442

DOI - Digital Object Identifier

10.3390/min11050442

Jazyk výsledku

angličtina

Název v původním jazyce

Collision of Bubbles with Solid Surface in the Presence of Specific Surfactants.

Popis výsledku v původním jazyce

The present work is motivated by the effort to understand basic processes occurring in three-phase systems where small bubbles interact with large particles. The simplified system of a single bubble rising in a stagnant liquid and colliding with a solid surface is studied. The effect of two specific surfactants, α-Terpineol and n-Octanol, is investigated. Two independent measurements are combined: bubble–solid surface collision experiments and the bubble shape oscillations induced by a movable capillary. It was observed that even for small concentrations of a surfactant, both the bubble shape oscillations and the bubble bouncing on the solid surface are significantly suppressed. Two predictions for the restitution coefficient are proposed. The equations include a term characterizing the suppression of the damping time in the presence of surfactants and a term balancing the inertia, capillary and viscous forces in the liquid film separating the bubble and the solid surface.

Název v anglickém jazyce

Collision of Bubbles with Solid Surface in the Presence of Specific Surfactants.

Popis výsledku anglicky

The present work is motivated by the effort to understand basic processes occurring in three-phase systems where small bubbles interact with large particles. The simplified system of a single bubble rising in a stagnant liquid and colliding with a solid surface is studied. The effect of two specific surfactants, α-Terpineol and n-Octanol, is investigated. Two independent measurements are combined: bubble–solid surface collision experiments and the bubble shape oscillations induced by a movable capillary. It was observed that even for small concentrations of a surfactant, both the bubble shape oscillations and the bubble bouncing on the solid surface are significantly suppressed. Two predictions for the restitution coefficient are proposed. The equations include a term characterizing the suppression of the damping time in the presence of surfactants and a term balancing the inertia, capillary and viscous forces in the liquid film separating the bubble and the solid surface.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

GA19-09518S: Dynamika nestacionárních dějů v plyno-kapalinových soustavách

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Minerals

ISSN

2075-163X

e-ISSN

2075-163X

Svazek periodika

11

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

442

Kód UT WoS článku

000662451900001

EID výsledku v databázi Scopus

2-s2.0-85104423097