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Dramatic effect of superfluidity on the collapse of ~4He vapor bubbles

机译:超流动对〜4He蒸气气泡破裂的戏剧性影响

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摘要

The lifetime of cavitation bubbles produced by an acoustic wave focused in liquid helium-4 is investigated. This lifetime is found to be different by orders of magnitude depending on whether the liquid is superfluid or not. We show that if the liquid is in the superfluid state, the bubble lifetime is well explained by a purely mechanical model, corresponding to the so-called Rayleigh regime. In the normal state, the Rayleigh-Plesset regime applies, in which heat diffusion plays a crucial role and dramatically increases the bubble lifetime.
机译:研究了聚焦在液态氦4中的声波产生的空化气泡的寿命。发现该寿命根据液体是否是超流体而在数量级上不同。我们表明,如果液体处于超流体状态,则气泡寿命可以通过纯机械模型很好地解释,该模型对应于所谓的瑞利机制。在正常状态下,采用瑞利-普莱塞特(Rayleigh-Plesset)体制,其中热扩散起着至关重要的作用,并显着延长了气泡寿命。

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  • 来源
    《Physical review》 |2016年第17期|174521.1-174521.4|共4页
  • 作者单位

    Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne-Universites, College de France, 24 rue Lhomond, 75005 Paris, France;

    Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne-Universites, College de France, 24 rue Lhomond, 75005 Paris, France;

    Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne-Universites, College de France, 24 rue Lhomond, 75005 Paris, France;

    Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne-Universites, College de France, 24 rue Lhomond, 75005 Paris, France;

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