Back to Search
Start Over
Direct Numerical Simulation of the Rayleigh?Taylor Instability with the Spectral Element Method.
- Source :
-
Chinese Physics Letters . Aug2009, Vol. 26 Issue 8, p084703-084703. 1p. - Publication Year :
- 2009
-
Abstract
- A novel method is proposed to simulate Rayleigh[?]Taylor instabilities using a specially-developed unsteady three-dimensional high-order spectral element method code. The numerical model used consists of Navier-Stokes equations and a transport-diffusive equation. The code is first validated with the results of linear stability perturbation theory. Then several characteristics of the Rayleigh[?]Taylor instabilities are studied using this three-dimensional unsteady code, including instantaneous turbulent structures and statistical turbulent mixing heights under different initial wave numbers. These results indicate that turbulent structures of Rayleigh-Taylor instabilities are strongly dependent on the initial conditions. The results also suggest that a high-order numerical method should provide the capability of simulating small scale fluctuations of Rayleigh[?]Taylor instabilities of turbulent flows. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 26
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 43987073
- Full Text :
- https://doi.org/10.1088/0256-307X/26/8/084703