A "Perfect" Hydrodynamic Similarity and the Effect of Small-Scale Vortices on the Large-Scale Dynamics
In the laboratory experiments designed to reproduce hydrodynamical phenomena of relevance for astrophysics the Reynolds numbers, although very large, are usually smaller than in real astrophysical systems. If the hydrodynamic flow reaches the turbulent state, it may then happen that differences (related to the difference in Reynolds numbers) would appear in the global-scale motions of the two systems. The difficulty in studying this issue in high energy density laboratory experiments lies in that equations of state and transport coefficients are usually not very well known, so that the subtle effect of the Reynolds number may be easily obscured by experimental uncertainties. An approach has recently been suggested [D.D. Ryutov, B.A. Remington, Phys. Plasmas, 10, 2629, 2003] that allows one to circumvent this difficulty and isolate the effect of the Reynolds number. In the present paper, after presenting a summary of the previous results, we briefly discuss various aspects of possible experiments.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15013739
- Report Number(s):
- UCRL-PROC-200929; TRN: US0801252
- Resource Relation:
- Conference: Presented at: 3rd International Conference on Inertial Fusion Sciences and Applications, Monterey, CA, United States, Sep 07 - Sep 12, 2003
- Country of Publication:
- United States
- Language:
- English
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