Size distribution of daughter bubbles or drops resulting from binary breakup due to random initial deformation conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00617552" target="_blank" >RIV/67985858:_____/25:00617552 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/25:43933736

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1383586625007117?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586625007117?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2025.132114" target="_blank" >10.1016/j.seppur.2025.132114</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Size distribution of daughter bubbles or drops resulting from binary breakup due to random initial deformation conditions

Popis výsledku v původním jazyce

The prediction of the interfacial area and hence the size distribution of bubbles or droplets in dispersed multiphase systems is of key importance as these are fundamentals parameters used in the design of apparatus used in separation and purification technologies. This paper presents a simplified model for the evolution of the fluid particle shape (bubble or droplet) breaking in turbulent flow. The model assumes that the particle is initiallyndeformed into a dumbbell shape. The time evolution of the particle shape is modelled by a set of Rayleigh-Plesset equations and the internal flow through the neck is included, assuming the inertial and viscous forces of the inner phase. The effect of the external flow is simulated by the initial deformation of the particle, the initial deformation rates and the Weber number, which characterises the ratio of the kinetic energy of the flow around the particle to the surface energy of the particle. The final daughter size distribution is obtained by applying random initial conditions, reflecting the random nature of turbulence. The results obtained from the model suggest that the size distribution of the daughter particles is strongly influenced by the ability of the inner phase to move between parts of the particle. In the case of bubbles, the gas moves easily resulting in a ∪-shaped bubble sizendistribution. Conversely, in the case of liquid droplets, the motion of the inner liquid is resisted by its higher inertia, resulting in a ∩-shaped droplet size distribution. Despite the simplified description of particle shape and deformation rates, the present model allows to physically capture and explain the differences in particle size distribution resulting from the binary breakup of bubbles and droplets in turbulent flows.

Název v anglickém jazyce

Size distribution of daughter bubbles or drops resulting from binary breakup due to random initial deformation conditions

Popis výsledku anglicky

The prediction of the interfacial area and hence the size distribution of bubbles or droplets in dispersed multiphase systems is of key importance as these are fundamentals parameters used in the design of apparatus used in separation and purification technologies. This paper presents a simplified model for the evolution of the fluid particle shape (bubble or droplet) breaking in turbulent flow. The model assumes that the particle is initiallyndeformed into a dumbbell shape. The time evolution of the particle shape is modelled by a set of Rayleigh-Plesset equations and the internal flow through the neck is included, assuming the inertial and viscous forces of the inner phase. The effect of the external flow is simulated by the initial deformation of the particle, the initial deformation rates and the Weber number, which characterises the ratio of the kinetic energy of the flow around the particle to the surface energy of the particle. The final daughter size distribution is obtained by applying random initial conditions, reflecting the random nature of turbulence. The results obtained from the model suggest that the size distribution of the daughter particles is strongly influenced by the ability of the inner phase to move between parts of the particle. In the case of bubbles, the gas moves easily resulting in a ∪-shaped bubble sizendistribution. Conversely, in the case of liquid droplets, the motion of the inner liquid is resisted by its higher inertia, resulting in a ∩-shaped droplet size distribution. Despite the simplified description of particle shape and deformation rates, the present model allows to physically capture and explain the differences in particle size distribution resulting from the binary breakup of bubbles and droplets in turbulent flows.

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/GA22-29605S" target="_blank" >GA22-29605S: Interakce bubliny nebo kapky s toroidním vírem</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

1873-3794

Svazek periodika

363

Číslo periodika v rámci svazku

14 August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

132114

Kód UT WoS článku

001432525800001

EID výsledku v databázi Scopus

2-s2.0-85218355874