Valid Regions of Formulas of Sound Speed in Bubbly Liquids

• 来源期刊: 中国物理快报（英文版）
• 关键词: @@
• 年，卷（期）: 2017,（6）
• 页码范围: 66-69
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/34/6/064701

摘要

There are numerous formulae relating to the predictions of sound wave in the cavitating and bubbly flows.However,the valid regions of those formulae are rather unclear from the view point of physics.In this work,the validity of the existing formulae is discussed in terms of three regions by employing the analysis of three typical lengths involved (viscous length,thermal diffusion length and bubble radius).In our discussions,viscosity and thermal diffusion are both considered together with the effects of relative motion between bubbles and liquids.The importance of relative motion and thermal diffusion are quantitatively discussed in a wide range of parameter zones (including bubble radius and acoustic frequency).The results show that for large bubbles,the effects of relative motion will be prominent in a wide region.