Reseash and Edicational Centre for Ion, Bauman Moscow State Technical University, 105005 Moscow, Russia.
Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia.
Molecules. 2021 Mar 16;26(6):1660. doi: 10.3390/molecules26061660.
In a recent paper [S. Khrapak, Molecules , 3498 (2020)], the longitudinal and transverse sound velocities of a conventional Lennard-Jones system at the liquid-solid coexistence were calculated. It was shown that the sound velocities remain almost invariant along the liquid-solid coexistence boundary lines and that their magnitudes are comparable with those of repulsive soft-sphere and hard-sphere models at the fluid-solid phase transition. This implies that attraction does not considerably affect the magnitude of the sound velocities at the fluid-solid phase transition. This paper provides further evidence to this by examining the generalized Lennard-Jones ( - 6) fluids with ranging from 12 to 7 and demonstrating that the steepness of the repulsive term has only a minor effect on the magnitude of the sound velocities. Nevertheless, these minor trends are identified and discussed.
在最近的一篇论文[S. Khrapak, Molecules, 3498 (2020)]中，计算了常规 Lennard-Jones 系统在液-固共存时的纵波和横波速度。结果表明，声速沿液-固共存边界线几乎不变，其大小与流体-固体相变时排斥软球和硬球模型的声速相当。这意味着吸引力在流体-固体相变时对声速的大小没有显著影响。本文通过研究范围为 12 到 7 的广义 Lennard-Jones（-6）流体，进一步证明了这一点，并表明排斥项的陡峭度对声速的大小只有很小的影响。然而，这些微小的趋势已经被识别并讨论。
