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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Nanohydrodynamics simulations: An atomistic view of the Rayleigh-Taylor instability
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Nanohydrodynamics simulations: An atomistic view of the Rayleigh-Taylor instability

机译:纳米流体动力学模拟:瑞利泰勒不稳定性的原子观

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Nanohydrodynamics simulations, hydrodynamics on the nanometer and nanosecond scale by molecular dynamics simulations for up to 100 million particles, are performed on the latest generation of supercomputers. Such simulations exhibit Rayleigh-Taylor instability, the mixing of a heavy fluid on top of a light in the presence of a gravitational field, initiated by thermal fluctuations at the interface, leading to the chaotic regime in the long-time evolution of the mixing process. The early-time behavior is in general agreement with linear analysis of continuum theory (Navier-Stokes), and the late-time behavior agrees quantitatively with experimental observations. Nanohydrodynamics provides insights into the turbulent mixing process that are inaccessible to either continuum calculations or to experiment.
机译:纳米流体动力学仿真是通过最新一代的超级计算机执行的多达1亿个粒子的分子动力学仿真,在纳米级和纳秒级进行的流体动力学。这样的模拟表现出瑞利-泰勒(Rayleigh-Taylor)的不稳定性,即在重力场的存在下,在界面上的热涨落引起的重流体在光的顶部混合,导致混合过程长期演变的混乱状态。 。早期行为与连续体理论的线性分析(Navier-Stokes)总体上是一致的,而后期行为在数量上与实验观察结果一致。纳米流体动力学提供了对于湍流混合过程的见解,这对于连续计算或实验都无法实现。

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