Ermakov G V, Lipnyagov E V, Perminov S A, Gurashkin A L
Institute of Thermal Physics, Ural Branch, RAS, 106 Amundsen St., Ekaterinburg 620016, Russia.
J Chem Phys. 2009 Jul 21;131(3):031102. doi: 10.1063/1.3179678.
The classical theory of homogeneous nucleation describes well the superheat threshold observed in experiments. It may be assumed therefore that homogeneous boiling-up of a liquid takes place in experiments, and the theory has been verified experimentally well. The streak photography used in this study showed that boiling-up of a superheated liquid at the threshold of the achievable superheat occurs at a limited number of surface fluctuation centers in a vessel, rather than in the bulk as one would expect with homogeneous nucleation. Thus, the homogeneous theory, which rather accurately describes the heterogeneous threshold of the achievable superheat, obviously is not confirmed in experiments.
均匀成核的经典理论很好地描述了实验中观察到的过热度阈值。因此可以假定，实验中发生了液体的均匀沸腾，并且该理论已得到很好的实验验证。本研究中使用的纹影摄影表明，过热液体在可达到的过热度阈值下的沸腾发生在容器中有限数量的表面波动中心，而不是如均匀成核所预期的那样发生在液体主体中。因此，虽然能相当准确地描述可达到过热度的非均匀阈值的均匀理论，显然在实验中未得到证实。
