超声波场激发下的冷液体中的气泡热力学:理论分析和数值计算
Jin Zhang1, Yu Zhang2, Yong Chen3
1State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China; Chengdu Fluid Dynamic Innovation Center, Chengdu 610071, China.
Ultrasonics sonochemistry
|June 28, 2024
概括
这项研究模拟了超声波下的冷气泡振荡中的热传递. 在高压下,当超声波频率与气泡共振频率不同时,热传递是增压的.
科学领域:
- 热力学是一种热力学.
- 流体力学 流体力学 流体力学
- 声学 声学 在声学方面
背景情况:
- 泡振荡中的热传递被简化为室温流体中的增热.
- 低温液体中热传递的热力学机制,特别是在超声波激发下,仍然不太清楚.
- 超声波场下的低温液体中的小振幅振荡对热力学建模具有独特的挑战.
研究的目的:
- 在外部超声波场下研究冷却液体中的气泡的热力学模型.
- 分析传热机制并计算气泡内的温度变化.
- 了解超声波频率相对于气泡共振频率对传热的影响.
主要方法:
- 基于冷却液体的热传递方程的气泡热力学模型的开发.
- 在受到超声波场影响的气泡内温度变化的计算.
- 通过在不同条件下检查泡行为的热传递机制的分析.
主要成果:
- 发现泡振荡中的传热机制取决于超声波频率与泡共振频率的比率.
- 在高压环境中,当超声波频率远离共振时,热传递可以被近似为adiabatic.
- 对双气泡系统和高压场景的分析为热传递动态提供了洞察力.
结论:
- 这项研究为了解超声波影响下的冷气泡动态中的热传递提供了理论基础.
- 研究结果表明,在特定的高压和非共振条件下,亚底离子近似值得信赖.
- 这项研究可以为随后准确计算热传递多热系数和低温双相流中的空隙分数测量提供信息.
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The speed of sound in fluids can be derived by considering a mechanical wave...
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