Large-eddy-simulation of 3-dimensional Rayleigh-Taylor instability in incompressible fluids |
| |
Authors: | WANG Lili Li Jiachun Xie Zhengtong |
| |
Institution: | 1. Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;LNM,Institute of Mechanics,Chinese Academy of Science,Beijing 100080,China 2. Institute of Applied Physics and Computational Mathematics,Beijing 100088,China |
| |
Abstract: | The 3-dimensional incompressible Rayleigh-Taylor instability is numerically studied through the large-eddy-simulation ( LES)
approach based on the passive scalar transport model. Both the instantaneous velocity and the passive scalar fields excited
by sinusoidal perturbation and random perturbation are simulated. A full treatment of the whole evolution process of the instability
is addressed. To verify the reliability of the LES code, the averaged turbulent energy as well as the flux of passive scalar
are calculated at both the resolved scale and the subgrid scale. Our results show good agreement with the experimental and
other numerical work. The LES method has proved to be an effective approach to the Rayleigh-Taylor instability. |
| |
Keywords: | Rayleigh-Taylor instability large-eddy-simulation passive scalar turbulent mixing |
本文献已被 万方数据 SpringerLink 等数据库收录! |