George E, Glimm J, Li X-L, Marchese A, Xu Z-L
Department of Applied Mathematics and Statistics, State University of New York, Stony Brook, NY 11794-3600, USA.
Proc Natl Acad Sci U S A. 2002 Mar 5;99(5):2587-92. doi: 10.1073/pnas.032568799. Epub 2002 Feb 19.
We present a Rayleigh-Taylor mixing rate simulation with an acceleration rate falling within the range of experiments. The simulation uses front tracking to prevent interfacial mass diffusion. We present evidence to support the assertion that the lower acceleration rate found in untracked simulations is caused, at least to a large extent, by a reduced buoyancy force due to numerical interfacial mass diffusion. Quantitative evidence includes results from a time-dependent Atwood number analysis of the diffusive simulation, which yields a renormalized mixing rate coefficient for the diffusive simulation in agreement with experiment.
我们展示了一个瑞利 - 泰勒混合速率模拟,其加速度速率处于实验范围内。该模拟使用前沿追踪来防止界面质量扩散。我们提供证据支持这样的断言:在未追踪的模拟中发现的较低加速度速率至少在很大程度上是由于数值界面质量扩散导致的浮力减小所引起的。定量证据包括来自扩散模拟的随时间变化的阿特伍德数分析结果,该分析得出了与实验一致的扩散模拟的重整化混合速率系数。