Vpliv materiala stene na dinamiko kavitacijskega mehurčka in udarnega vala

Kočoski, Aleksandar (author), Dular, Matevž (mentor), Petkovšek, Martin (co-mentor)

Pojem kavitacija opisuje pojav in aktivnost mehurčkov v kapljevini zaradi padca tlaka. Razumevanje pojava omogoči izogibanje škodi in konstruktivno izkoriščanje destruktivne moči. V nalogi je analiziran vpliv materiala bližnje stene na dinamiko kavitacijskega mehurčka in udarnega vala. S hitro kamero je bil posnet razvoj osamljenega lasersko ustvarjenega mehurčka v mirujoči vodi na različnih oddaljenostih od stekla in pleksi stekla. Predstavljeni so kvantitativni in kvalitativni rezultati računalniške obdelave slik. Čas kolapsa je primerjan s teoretičnim po Rayleigh-Plessetovi enačbi.

• Language: Slovenian
• Keywords: kavitacija, dinamika mehurčka, hitre kamere, stena, steklo, pleksi steklo, Rayleighjev čas kolapsa
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [A. Kočoski]
• Year: 2021
• Number of pages: XVII, 50 str.
• PID: 20.500.12556/RUL-128907
• UDC: 532.528:666.15:004.932(043.2)
• COBISS.SI-ID: 73046531
• Publication date in RUL: 14.08.2021

Secondary language

• Language: English
• Title: The influence of the material of a solid surface on the dynamics of a cavitation bubble and shock wave

Abstract

The term cavitation describes the occurrence and activity of bubbles in a liquid due to a pressure drop. Understanding the phenomenon enables avoiding damage and constructive use of the destructive power. This thesis analyzes the influence of the material of a nearby solid surface on the dynamics of a cavitation bubble and shock wave. The development of a single laser-generated bubble in quiescent water at various distances from glass and plexiglass was recorded with a high-speed camera. Quantitative and qualitative results of computer image processing are presented. The collapse time is compared with the theoretical time according to the Rayleigh-Plesset equation.

• Keywords: cavitation, bubble dynamics, high-speed cameras, solid surface, glass, plexiglass, Rayleigh collapse time