Time series analysis based study of a mass-spring-like oscillation and detachment of a metal pendant droplet

Jeromen, Andrej (author), Govekar, Edvard (author)

The subject of this study is the vertical mass-spring-like oscillation of a pendant droplet and its resonant detachment, which was experimentally observed in the process of laser droplet generation from a metal wire. The process was characterized by various time series, which were generated from a sequence of infrared intensity images of the process. Following a visual inspection of pendant droplet images and an analysis of a wavelet based time-frequency map of the dropletʼs vertical displacement time series, the pendant dropletʼs oscillation is described by a time-variable mass-spring system. Based on the characteristics of the time-frequency map, the resonant nature of the pendant droplet detachment was demonstrated. Additionally, an algebraic expression was formulated, which can be used to predict the detached dropletʼs diameter as a function of the laser pulse frequency.

• Language: English
• Keywords: time series, time-frequency analysis, pendant droplet, mass-spring systems, droplet detachment
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2016
• Number of pages: Str. 503-516
• Numbering: Vol. 80
• PID: 20.500.12556/RUL-105756
• UDC: 532.5:519.6(045)
• ISSN on article: 0888-3270
• DOI: 10.1016/j.ymssp.2016.04.038
• COBISS.SI-ID: 14623515
• Publication date in RUL: 12.12.2018

Record is a part of a journal

• Title: Mechanical systems and signal processing
• Shortened title: Mech. syst. signal process.
• Publisher: Elsevier
• ISSN: 0888-3270
• COBISS.SI-ID: 169243

Secondary language

• Language: Slovenian
• Keywords: analize časovnih serij, časovne serije, ločevanje kapljic

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0241
• Name: Sinergetika kompleksnih sistemov in procesov