Spectral analysis of the turbulent mixing of two fluids
- Univ. of Illinois, Urbana-Champaign, IL (United States)
We describe a spectral approach to the investigation of fluid instability, generalized turbulence, and the interpenetration of fluids across an interface. The Technique also applies to a single fluid with large variations in density. Departures of fluctuating velocity components from the local mean are far subsonic, but the mean Mach number can be large. Validity of the description is demonstrated by comparisons with experiments on turbulent mixing due to the late stages of Rayleigh-Taylor instability, when the dynamics become approximately self-similar in response to a constant body force. Generic forms for anisotropic spectral structure are described and used as a basis for deriving spectrally integrated moment equations that can be incorporated into computer codes for scientific and engineering analyses.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 105890
- Report Number(s):
- LA-UR-95-2927; ON: DE95017559
- Resource Relation:
- Other Information: DN: Thesis submitted to University of Illinois, Urbana-Champaign, 1995.; TH: Thesis (Ph.D.); PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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