Large-eddy-simulation of 3-dimensional Rayleigh-Taylor instability in incompressible fluids
Large-eddy-simulation of 3-dimensional Rayleigh-Taylor instability in incompressible fluids
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.
Rayleigh-Taylor instability, large-eddy-simulation, passive scalar, turbulent mixing
95-106
Wang, Lili
c50767b1-7474-4094-9b06-4fe64e9fe362
Li, Jiachun
856168cb-0cf1-4ea2-a414-153fda562a3c
Xie, Zhengtong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
2002
Wang, Lili
c50767b1-7474-4094-9b06-4fe64e9fe362
Li, Jiachun
856168cb-0cf1-4ea2-a414-153fda562a3c
Xie, Zhengtong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Wang, Lili, Li, Jiachun and Xie, Zhengtong
(2002)
Large-eddy-simulation of 3-dimensional Rayleigh-Taylor instability in incompressible fluids.
Science in China A: Mathematice, 45 (1), .
(doi:10.1360/02ys9011).
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.
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Published date: 2002
Additional Information:
Code?01YW0068
Keywords:
Rayleigh-Taylor instability, large-eddy-simulation, passive scalar, turbulent mixing
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Local EPrints ID: 23482
URI: http://eprints.soton.ac.uk/id/eprint/23482
PURE UUID: 0b6b5207-3ae4-4817-81ad-980b8924ef94
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Date deposited: 28 Mar 2006
Last modified: 16 Mar 2024 03:40
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Author:
Jiachun Li
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