The interaction between ultrasound and the air-liquid interface is widely involved in sonar communication,medical imaging,acoustic detection,etc.In this work,we report an intriguing bubbling phenomenon occurring at th...The interaction between ultrasound and the air-liquid interface is widely involved in sonar communication,medical imaging,acoustic detection,etc.In this work,we report an intriguing bubbling phenomenon occurring at the liquid surface exposed to acoustic radiation.The phenomenon can be robustly triggered once the distance between the liquid surface and the acoustic probe is adjusted to multiples of half sound wavelength.It is clarified that the bubbling is attributed to the Helmholtz resonance of the liquid concavity caused by the acoustic radiation force.The sizes of the final obtained bubbles show a universal scaling law with acoustic Bond number and acoustic Reynolds number:R≈λ·Bo_(a)·(Re_(a))^(1/2),which is independent of the types of liquids.Moreover,it was found that the bubbling phenomenon showed a significantly enhanced particle absorption ability,thus shedding light on the development of solid filter-free air purification techniques.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 12272314, and 11972303)。
文摘The interaction between ultrasound and the air-liquid interface is widely involved in sonar communication,medical imaging,acoustic detection,etc.In this work,we report an intriguing bubbling phenomenon occurring at the liquid surface exposed to acoustic radiation.The phenomenon can be robustly triggered once the distance between the liquid surface and the acoustic probe is adjusted to multiples of half sound wavelength.It is clarified that the bubbling is attributed to the Helmholtz resonance of the liquid concavity caused by the acoustic radiation force.The sizes of the final obtained bubbles show a universal scaling law with acoustic Bond number and acoustic Reynolds number:R≈λ·Bo_(a)·(Re_(a))^(1/2),which is independent of the types of liquids.Moreover,it was found that the bubbling phenomenon showed a significantly enhanced particle absorption ability,thus shedding light on the development of solid filter-free air purification techniques.
