Influence of the accommodation coefficient on nonlinear bubble oscillations
Influence of the accommodation coefficient on nonlinear bubble oscillations
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DOI：
10.1121/1.3436520
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发表时间：
2010-07-01
影响因子：
2.4
通讯作者：
Dopazo, Cesar
中科院分区：
文献类型：
--
作者：
Fuster, Daniel;Hauke, Guillermo;Dopazo, Cesar
本文采用Hertz-Langmuir-Knudsen界面质量通量近似，数值研究了传质过程对球形单气泡动力学的影响。气泡行为，有和没有传质，研究了不同的压力波振幅和频率值，以及初始气泡半径。而传质过程似乎没有发挥显着的作用，气泡响应的压力振幅小于0.9大气压，他们似乎有一个重要的影响时，振幅大于或等于1大气压。对于后一种情况，最小液体压力达到其蒸气压附近的值，传质的重要性取决于频率。对于10（3）-10（5）Hz范围内的频率和几十微米量级的初始气泡半径，有质量传递和没有质量传递的气泡内爆显著不同;较小的半径显示较低的灵敏度。因此，在这种情况下，准确的模型预测必须仔细选择调节系数的正确值。对于大于10（5）Hz的频率，作为第一近似，可以忽略质量传递。(C)2010年美国声学学会。[DOI 10.1121/1.3436520]
This paper numerically investigates the effect of mass transfer processes on spherical single bubble dynamics using the Hertz-Langmuir-Knudsen approximation for the mass flux across the interface. Bubble behavior, with and without mass transfer, is studied for different values of pressure wave amplitude and frequency, as well as initial bubble radius. Whereas mass transfer processes do not seem to play a significant role on the bubble response for pressure amplitudes smaller than 0.9 atm, they appear to have an important effect when the amplitude is greater than or equal to 1 atm. For the later case, where the minimum liquid pressure reaches values around its vapor pressure, the importance of mass transfer depends on frequency. For frequencies in the 10(3)-10(5) Hz range and initial bubble radii of the order of tens of microns, bubble implosions with and with no mass transfer are significantly different; smaller radii display a lower sensitivity. In this regime, accurate model predictions must, therefore, carefully select the correct value of the accommodation coefficient. For frequencies greater than 10(5) Hz, as a first approximation mass transfer can be ignored. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3436520]