Drittes Physikalisches Institut, Georg-August Universität Göttingen, Göttingen, Germany.
Ultrason Sonochem. 2011 Mar;18(2):595-600. doi: 10.1016/j.ultsonch.2010.10.004. Epub 2010 Oct 13.
A generic bubble structure in a 230 kHz ultrasonic field is observed in a partly developed standing wave field in water. It is characterized by high-speed imaging, sonoluminescence recordings, and surface cleaning tests. The structure has two distinct bubble populations. Bigger bubbles (much larger than linear resonance size) group on rings in planes parallel to the transducer surface, apparently in locations of driving pressure minima. They slowly rise in a jittering, but synchronous way, and they can have smaller satellite bubbles, thus resembling the arrays of bubbles observed by Miller [D. Miller, Stable arrays of resonant bubbles in a 1-MHz standing-wave acoustic field, J. Acoust. Soc. Am. 62 (1977) 12]. Smaller bubbles (below and near linear resonance size) show a fast "streamer" motion perpendicular to and away from the transducer surface. While the bigger bubbles do not emit light, the smaller bubbles in the streamers show sonoluminescence when they pass the planes of high driving pressure. Both bubble populations exhibit cleaning potential with respect to micro-particles attached to a glass substrate. The respective mechanisms of particle removal, though, might be different.
在水中部分发展的驻波场中，观察到 230 kHz 超声场中的通用气泡结构。它的特点是高速成像、声致发光记录和表面清洁测试。该结构有两个明显的气泡群。较大的气泡（远大于线性共振尺寸）在与换能器表面平行的平面上成环排列，显然在驱动压力最小的位置。它们以抖动但同步的方式缓慢上升，并且它们可以有较小的卫星气泡，因此类似于 Miller 观察到的气泡阵列[D. Miller，在 1 MHz 驻波声场中稳定的共振气泡阵列，J. Acoust. Soc. Am. 62（1977）12]。较小的气泡（低于和接近线性共振尺寸）表现出垂直于换能器表面并远离换能器表面的快速“流光”运动。虽然较大的气泡不发光，但流光中的较小气泡在经过高驱动压力平面时会发出声致发光。两个气泡群都表现出对附着在玻璃基板上的微粒子的清洁潜力。然而，去除粒子的相应机制可能不同。
