Bubble size distribution in acoustic droplet vaporization via dissolution using an ultrasound wide-beam method.
Bubble size distribution in acoustic droplet vaporization via dissolution using an ultrasound wide-beam method.
复制标题
使用超声宽束方法通过溶解进行声学液滴汽化中的气泡尺寸分布。
DOI：
10.1016/j.ultsonch.2013.11.016
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发表时间：
2014-05
影响因子：
8.4
通讯作者：
Wan, Mingxi
中科院分区：
文献类型：
--
作者：
Zong, Yujin;Li, Wusong;Zhang, Siyuan;Wan, Mingxi
在广泛的领域中，许多空化增强应用的性能和效率取决于空化泡的大小分布。因此，空化泡大小的估计将有利于依赖于空化的生物和工业应用。本文提出了一种低压宽波束的声学方法，获得了空化泡群溶解过程的时间强度曲线，进而确定了空化泡的大小分布。研究了空化泡在生理盐水和经未脱气或脱气生理盐水稀释的相移纳米液滴乳剂中的溶解情况，量化了聚焦超声脉冲持续时间（PD）、声功率（AP）或峰值负压（PNP）对诱导空化泡大小分布的影响。结果发现，PD的增加会导致大气泡的产生，而AP对盐水中平均气泡大小的影响很小。我们还认识到，较长的PD和较高的PNP分别增加了相移纳米液滴乳剂悬浮液中大泡和小泡的比例。此外，与未脱气的悬浮液相比，脱气后的悬浮液平均气泡尺寸更小。此外，还计算了相移纳米液滴乳化液稀释悬浮液中产生的空化气泡的凝结，讨论了气泡凝结对声液滴汽化气泡大小估计的影响。结果表明，不考虑凝结的计算可能会低估平均气泡尺寸；考虑凝结的计算对小气泡的尺寸分布影响较大，而对大气泡的尺寸分布影响较小。考虑气泡凝结和不考虑气泡凝结时，可达到的最小气泡半径分别为0.4和1.7 μm，步长为0.3 μm。这种声学技术提供了一种估计不透明介质中空化气泡种群大小分布的方法，可能是一种有前途的工具，用于需要调整超声参数来控制空化气泡的大小分布。
Performance and efficiency of numerous cavitation enhanced applications in a wide range of areas depend on the cavitation bubble size distribution. Therefore, cavitation bubble size estimation would be beneficial for biological and industrial applications that rely on cavitation. In this study, an acoustic method using a wide beam with low pressure is proposed to acquire the time intensity curve of the dissolution process for the cavitation bubble population and then determine the bubble size distribution. Dissolution of the cavitation bubbles in saline and in phase-shift nanodroplet emulsion diluted with undegassed or degassed saline was obtained to quantify the effects of pulse duration (PD) and acoustic power (AP) or peak negative pressure (PNP) of focused ultrasound on the size distribution of induced cavitation bubbles. It was found that an increase of PD will induce large bubbles while AP had only a little effect on the mean bubble size in saline. It was also recognized that longer PD and higher PNP increases the proportions of large and small bubbles, respectively, in suspensions of phase-shift nanodroplet emulsions. Moreover, degassing of the suspension tended to bring about smaller mean bubble size than the undegassed suspension. In addition, condensation of cavitation bubble produced in diluted suspension of phase-shift nanodroplet emulsion was involved in the calculation to discuss the effect of bubble condensation in the bubble size estimation in acoustic droplet vaporization. It was shown that calculation without considering the condensation might underestimate the mean bubble size and the calculation with considering the condensation might have more influence over the size distribution of small bubbles, but less effect on that of large bubbles. Without or with considering bubble condensation, the accessible minimum bubble radius was 0.4 or 1.7 μm and the step size was 0.3 μm. This acoustic technique provides an approach to estimate the size distribution of cavitation bubble population in opaque media and might be a promising tool for applications where it is desirable to tune the ultrasound parameters to control the size distribution of cavitation bubbles.
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影响因子：
3.2
作者：
M. Hauptmann;H. Struyf;S. Gendt;C. Glorieux;S. Brems
通讯作者：
M. Hauptmann;H. Struyf;S. Gendt;C. Glorieux;S. Brems
影响因子：
8.4
作者：
Iida, Yasuo;Ashokkumar, Muthupandian;Lee, Judy
通讯作者：
Lee, Judy
影响因子：
1
作者：
Labouret, S;Frohly, J
通讯作者：
Frohly, J
影响因子：
2.9
作者：
Zhang, M.;Fabiilli, M. L.;Haworth, K. J.;Fowlkes, J. B.;Kripfgans, O. D.;Roberts, W. W.;Ives, K. A.;Carson, P. L.
通讯作者：
Carson, P. L.
DOI：
10.1142/p219
发表时间：
2000-12
期刊：
--
影响因子：
--
作者：
Sheng-cai Li
通讯作者：
Sheng-cai Li