Wave propagation in liquids with oscillating vapor-gas bubbles. (25th March 2018)

• Record Type: Journal Article
• Authors: Zhang, Yuning; Guo, Zhongyu; Du, Xiaoze
• Is Part Of: Applied thermal engineering. Volume 133(2018)
• Page Start: 483
• Page End: 492
• Publication Date: 2018-03-25
• Subjects: Wave propagation -- Cavitation -- Vapor-gas bubbles -- Wave speed -- Cavitation modelling; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2018.01.056
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Effects of oscillating vapor-gas bubbles on wave speed are theoretically investigated. Three regions are defined in wave speed curve by employing two critical frequencies. Vapor mass fraction shows remarkable influences in regions 1 and 2. Abstract: In the present paper, wave propagation in liquids with oscillating vapor-gas bubbles is numerically investigated with a focus on the variations of the wave speed. A wide range of influencing parameters (including frequency, vapor mass fraction, bubble radius and void fraction) on the phenomenon are shown and discussed. According to the influences of frequency, the wave speed in the vapor-gas bubbly liquids could be categorized into three regions by two critical frequencies. In regions 1 and 3, the wave speed is frequency-independent while in region 2, the wave speed varies strongly with the frequency. Vapor mass fraction shows remarkable influences on the wave speed in regions 1 and 2 together with the critical frequencies separating the two regions. Finally, the influences of variations of the ambient temperature on the wave speed are discussed with demonstrating examples.