AN IMPROVED THEORY FOR THE PREDICTION OF MICROCAVITATION THRESHOLDS
AN IMPROVED THEORY FOR THE PREDICTION OF MICROCAVITATION THRESHOLDS
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DOI：
10.1109/58.19152
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发表时间：
1989-03-01
影响因子：
3.6
通讯作者：
APFEL, RE
中科院分区：
文献类型：
--
作者：
HOLLAND, CK;APFEL, RE
提出了一种近似的解析公式，允许在各种频率和宿主流体参数的瞬态空化的声压阈值的计算。具体来说，R。Apfel（1986）的理论被扩展到包括与拉普拉斯压力相关的时间延迟的估计，2 σ/R/sub 0/，其中σ是表面张力，R/sub 0/是初始半径。还提出了一个修正系数的时间平均的压力差，在增长过程中的气泡壁。一个最佳的大小分布的核的样品的倾向，微空化的表现。讨论了瞬态空化在医学超声中的作用。<>
An approximate analytical formulation is presented that allows for the calculation of acoustic pressure thresholds for transient cavitation over a variety of frequencies and host fluid parameters. Specifically, R.E. Apfel's (1986) theory is extended to include an estimate of the time delay associated with the Laplace pressure, 2 sigma /R/sub 0/, where sigma is the surface tension and R/sub 0/ is the initial radius. Also presented is a correction factor for the time-averaged pressure difference, across the bubble wall during growth. An optimum size distribution of nuclei for the predisposition of a sample to microcavitation is exhibited. The role of transient cavitation in medical ultrasound is discussed.<>