首页> 外文期刊>International Journal of Heat and Mass Transfer >3D Simulations to investigate initial condition effects on the growth of Rayleigh-Taylor mixing
【24h】

3D Simulations to investigate initial condition effects on the growth of Rayleigh-Taylor mixing

机译:3D模拟研究初始条件对Rayleigh-Taylor混合生长的影响

获取原文
获取原文并翻译 | 示例
           

摘要

The effect of initial conditions on the growth rate of turbulent Rayleigh-Taylor (RT) mixing has been studied using carefully formulated numerical simulations. An implicit large-eddy simulation (ILES) that uses a finite-volume technique was employed to solve the three-dimensional incompressible Euler equations with numerical dissipation. The initial conditions were chosen to test the dependence of the RT growth parameters (α_b, α_s) on variations in (a) the spectral bandwidth, (b) the spectral shape, and (c) discrete banded spectra. Our findings support the notion that the overall growth of the RT mixing is strongly dependent on initial conditions. Variation in spectral shapes and bandwidths are found to have a complex effect of the late time development of the RT mixing layer, and raise the question of whether we can design RT transition and turbulence based on our choice of initial conditions. In addition, our results provide a useful database for the initialization and development of closures describing RT transition and turbulence.
机译:使用精心制定的数值模拟研究了初始条件对湍流瑞利-泰勒(RT)混合生长速率的影响。采用了有限体积技术的隐式大涡模拟(ILES)来求解具有数值耗散的三维不可压缩欧拉方程。选择初始条件以测试RT生长参数(α_b,α_s)对(a)光谱带宽,(b)光谱形状和(c)离散带状光谱变化的依赖性。我们的发现支持以下观点,即RT混合的整体增长在很大程度上取决于初始条件。发现频谱形状和带宽的变化对RT混合层的后期开发具有复杂的影响,并提出了一个问题,即我们是否可以根据初始条件的选择来设计RT过渡和湍流。此外,我们的结果为描述RT过渡和湍流的密封件的初始化和开发提供了有用的数据库。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号