Original title: Lagrangeovský model pohybu kavitační bubliny
Translated title: Lagrangian tracking of the cavitation bubble
Authors: Bossio Castro, Alvaro Manuel ; Zatočilová, Jitka (referee) ; Rudolf, Pavel (advisor)
Document type: Master’s theses
Year: 2019
Language: eng
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Abstract: In this thesis, the dynamics of an isolated cavitation bubble submerged in a steady flow is studied numerically. A Lagrangian-Eulerian approach is considered, in which properties of the fluid are computed first by means of Eulerian methods (in this study the commercial CFD software Ansys Fluent 19 was used) and the trajectory of the bubble is then computed in a Lagrangian fashion, i.e. the bubble is considered as a small particle moving relative to the fluid, due to the effect of several forces depending on fluid's pressure field, fluid's velocity field and bubble's radius. Bubble's radius dynamics, modeled by Rayleigh-Plesset equation, has a big influence on its kinetics, so a special attention is given to it. Two study cases are considered. The first one, motivated by acoustic cavitation is concerned with the response of the bubble's radius in a static flow under the influence of an oscillatory pressure field, the second one studies the trajectory of the bubble submerged in a fluid passing by a Venturi tube and a sharp-edged orifice plate.
Keywords: bubble dynamics; Cavitation; numerical methods for odes.; ordinary differential equations; Rayleigh-Plesset equation; bubble dynamics; Cavitation; numerical methods for odes.; ordinary differential equations; Rayleigh-Plesset equation

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/175486

Permalink: http://www.nusl.cz/ntk/nusl-401546


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Universities and colleges > Public universities > Brno University of Technology
Academic theses (ETDs) > Master’s theses