Anisotropic Density Fluctuations in a Nearly Incompressible Hydrodynamic Fluid

Details Anisotropic Density Fluctuations in a Nearly Incompressible Hydrodynamic Fluid Anisotropic Density Fluctuations in a Nearly Incompressible Hydrodynamic Fluid

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...604l.125d&link_type=abstract

The Astrophysical Journal, Volume 604, Issue 2, pp. L125-L128.

Astronomy and Astrophysics

Astronomy

6

Ism: General, Methods: Numerical, Plasmas, Sun: Solar Wind, Turbulence

Scientific paper

Nonlinear inertial range hydrodynamic turbulence simulations, describing a high-β interstellar plasma fluid, demonstrate spectral anisotropy in the density spectrum. The anisotropic fluctuations, developed mainly in the high-frequency component of the fluid, are driven primarily by low-frequency incompressible fluctuations. The anisotropy occurs predominantly in large-scale structures; in short-scale structures, isotropy occurs in fully developed compressible turbulence.

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