实验和数值研究的喷气动力学化气泡在双粒子附近的双粒子
Yuning Zhang1, Xuan Lu1, Jinsen Hu2
1College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, China.
Ultrasonics sonochemistry
|November 21, 2024
概括
这项研究探讨了在双粒子附近的化气泡喷气动力学,揭示了三种喷气类型:泡分裂,冲击和非冲击. 结果详细介绍了喷气形成机制和气泡崩期间的温度变化.
科学领域:
- 流体动力学 流体动力学
- 声学 声学 在声学方面
- 热力学是一种热力学.
背景情况:
- 化气泡动力学在各种应用中至关重要,包括医疗治疗和工业过程.
- 了解在粒子附近泡崩时的喷气形成对于预测系统行为至关重要.
研究的目的:
- 为了研究在双粒子系统附近化气泡产生的喷气动力学.
- 分析气泡形态,压力梯度和粒子接近对喷气形成和流体温度的影响.
主要方法:
- 高速摄影被用来捕捉气泡和喷气体形态.
- 使用OpenFOAM解决器进行的数值模拟模拟了两相流体压缩性,相变,热传递和表面张力.
- 在泡振荡和喷气冲击期间分析流体温度变化.
主要成果:
- 确定了三种不同的喷气动力学:泡分裂双喷气,冲击单喷气和不冲击双喷气.
- 由环状压差驱动的气泡分裂,产生了不平等的子气泡和具有明显温度配置的对立喷流.
- 由形压力梯度形成的冲击喷气显示,在粒子附近局部温度增加,在泡接口透时达到峰值温度.
- 不碰撞的双喷气,由相反的压力梯度诱导,随着喷气流的接近,表现出内部泡温度的增加.
结论:
- 这项研究将双重粒子附近的空洞气泡喷流动力学分为三个不同的模式.
- 气泡分裂和喷气形成受特定的压力梯度分布的控制,影响气泡形态和喷气方向.
- 流体温度起着重要的作用,在泡振荡和与粒子的喷射相互作用期间观察到局部加热和冷却.
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