COMPUTATIONAL SIMULATION OF CAVITATION BUBBLE COLLAPSE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU145409" target="_blank" >RIV/00216305:26210/20:PU145409 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.engmech.cz/improc/2020/094.pdf" target="_blank" >https://www.engmech.cz/improc/2020/094.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21495/5896-3-094" target="_blank" >10.21495/5896-3-094</a>

Jazyk výsledku

angličtina

Název v původním jazyce

COMPUTATIONAL SIMULATION OF CAVITATION BUBBLE COLLAPSE

Popis výsledku v původním jazyce

Cavitation threatens lifetime of hydraulic machines, ship propellers or diesel injection nozzles, but can also serve as efficient way of pathogenic microorganisms eradication, water disinfection and chemical residuals removal. While classical Rayleigh-Plesset equation provides suitable 1D tool for description of the bubble behavior away from the wall, it suffers serious problems close to solid boundary due to its assumption of bubble sphericity during all stages of the bubble life. Therefore, a detail computational simulation based on RANS equations and multiphase Volume of Fluid approach was performed. Simulation was able to capture microjet, which deforms the bubble in solid wall vicinity, penetrates through bubble interior and is responsible for transformation from vapor bubble to vapor ring. It is important that numerical solution enabled detailed spatial description of the bubble evolution and allowed to distinguish between the pressure peaks caused by microjet impact on the wall and bubble collapse, thereby enhancing our understanding of the bubble collapse close to the solid boundary.

Název v anglickém jazyce

COMPUTATIONAL SIMULATION OF CAVITATION BUBBLE COLLAPSE

Popis výsledku anglicky

Cavitation threatens lifetime of hydraulic machines, ship propellers or diesel injection nozzles, but can also serve as efficient way of pathogenic microorganisms eradication, water disinfection and chemical residuals removal. While classical Rayleigh-Plesset equation provides suitable 1D tool for description of the bubble behavior away from the wall, it suffers serious problems close to solid boundary due to its assumption of bubble sphericity during all stages of the bubble life. Therefore, a detail computational simulation based on RANS equations and multiphase Volume of Fluid approach was performed. Simulation was able to capture microjet, which deforms the bubble in solid wall vicinity, penetrates through bubble interior and is responsible for transformation from vapor bubble to vapor ring. It is important that numerical solution enabled detailed spatial description of the bubble evolution and allowed to distinguish between the pressure peaks caused by microjet impact on the wall and bubble collapse, thereby enhancing our understanding of the bubble collapse close to the solid boundary.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

21100 - Other engineering and technologies

Projekt

<a href="/cs/project/GA19-10660S" target="_blank" >GA19-10660S: Odstranění estrogenů z odpadních vod hydrodynamickou kavitací v kombinaci s pokročilými oxidačními procesy</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

ENGINEERING MECHANICS 2020

ISBN

978-80-214-5896-3

ISSN

1805-8248

e-ISSN

—

Počet stran výsledku

4

Strana od-do

94-97

Název nakladatele

BRNO UNIV TECHNOL, FAC MECHANICAL ENGINEERING

Místo vydání

BRNO

Místo konání akce

Online

Datum konání akce

24. 11. 2020

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000667956100016