【摘要】：考慮了非球形氣泡在聲場中的形狀振動,推導(dǎo)了非球形氣泡和球形氣泡之間的次Bjerknes力方程,數(shù)值模擬了聲場中非球形氣泡和球形氣泡之間的次Bjerknes力和兩個球形氣泡之間的次Bjerknes力,并對非球形氣泡和球形氣泡之間的次Bjerknes力的影響因素進(jìn)行了分析討論.研究結(jié)果表明:當(dāng)驅(qū)動聲壓振幅大于非球形氣泡的Black閾值且又能使得非球形氣泡穩(wěn)定振動時,在第一個聲驅(qū)動周期內(nèi),非球形氣泡和球形氣泡之間的次Bjerknes力和兩個球形氣泡的次Bjerknes力方向差異較大,在大小上是兩個球形氣泡次Bjerkens力的數(shù)倍,且有著更長的作用距離.非球形氣泡和球形氣泡之間的次Bjerknes力取決于非球形氣泡的形狀模態(tài)、兩個氣泡初始半徑的比值、驅(qū)動聲壓振幅、氣泡間距和兩個氣泡的相對位置.
[Abstract]:Considering the shape vibration of a non-spherical bubble in a sound field, the secondary Bjerknes force equation between a non-spherical bubble and a spherical bubble is derived. The secondary Bjerknes force between a non-spherical bubble and a spherical bubble in a sound field and a secondary Bjerknes force between two spherical bubbles are numerically simulated, and the factors affecting the secondary Bjerknes force between a non-spherical bubble and a spherical bubble are analyzed and discussed. The results show that when the amplitude of the driving sound pressure is larger than the black threshold of the non-spherical bubble and the vibration of the non-spherical bubble can be stabilized, during the first acoustic driving period, The secondary Bjerknes force between the non-spherical bubble and the spherical bubble is different from that of the secondary Bjerknes force of the two spherical bubbles. It is several times larger than the secondary Bjerkens force of the two spherical bubbles and has a longer acting distance. The secondary Bjerknes force between a non-spherical bubble and a spherical bubble depends on the shape mode of the non-spherical bubble, the ratio of the initial radius of the two bubbles, the amplitude of the driving sound pressure, the bubble spacing and the relative position of the two bubbles.
【作者單位】： 陜西師范大學(xué)陜西省超聲學(xué)重點(diǎn)實(shí)驗(yàn)室;寧夏師范學(xué)院物理與電子信息工程學(xué)院納米結(jié)構(gòu)及功能材料工程技術(shù)研究中心;
【基金】：國家自然科學(xué)基金(批準(zhǔn)號:11374200,11674206)資助的課題~~
【分類號】：O42

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