Streaming induced by ultrasonic vibration in a water vessel
Streaming induced by ultrasonic vibration in a water vessel
复制标题
DOI：
10.1143/jjap.39.3636
复制
发表时间：
2000-06-01
期刊：
影响因子：
--
通讯作者：
Sasaki, Y
中科院分区：
文献类型：
--
作者：
Nomura, S;Murakami, K;Sasaki, Y
使用多种液体对水容器中超声波振动引起的流动模式进行了实验研究。在自来水中，由于超声波振动产生大量空化气泡，驻波压力节点周围会出现空化气泡涡流。由空化气泡流引起的瑞利型声流也在自来水中引起。在30%的甘油水溶液中，由于粘性引起的超声波能量的耗散，发生从振动器向上流动的埃卡特流。另一方面，在脱气水中，由于在水容器中形成均匀且稳定的驻波，因此几乎不产生流。 27.8 kHz 振动在水容器中产生的声流速度为 1 至 6 mm/s。自来水中的空化气泡流完全独立于正常的瑞利或埃卡特流。此气泡流比以前的流要快得多。
The flow pattern induced by ultrasonic vibration in a water vessel is investigated experimentally using several liquids. In tap water, vortex streaming of cavitation bubbles around the pressure node of a standing wave occurred because of the large number of cavitation bubbles generated by the ultrasonic vibration. Acoustic streaming of the Rayleigh type caused by cavitation bubble streaming is also induced in tap water. In a glycerin aqueous solution of 30%, Eckart streaming, which flowed upward from the vibrator, occurred due to the dissipation of ultrasonic energy caused by viscosity, On the other hand, in degassed water, streaming is hardly generated at all since a uniform and stable standing wave is formed in the water vessel. The velocity of the acoustic streaming generated in the water vessel by 27.8 kHz vibration is 1 to 6 mm/s. The cavitation bubble streaming in tap water is completely independent of normal Rayleigh or Eckart streaming. This bubble streaming is considerably faster than previous streaming.