The interaction of acoustic radiation with turbulence
1988; IOP Publishing; Volume: 326; Linguagem: Inglês
10.1086/166108
ISSN1538-4357
Autores Tópico(s)Solar and Space Plasma Dynamics
Resumoview Abstract Citations (171) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Interaction of Acoustic Radiation with Turbulence Goldreich, Peter ; Kumar, Pawan Abstract The authors derive expressions for the spectral emissivity and absorptivity of acoustic radiation by low Mach number turbulent fluids. They consider three types of turbulence. The first is free turbulence, that is, turbulence which is not subject to external forces. The second and third examples are special cases of forced turbulence, turbulence maintained by stirring with spoons and turbulent pseudoconvection. The resulting formulae are used to estimate the equilibrium energies and quality factors of the acoustic modes in a box which contains turbulent fluid. The scattering of acoustic radiation by the turbulent velocity and pressure fluctuations is treated and the rate at which nonlinear interactions transfer energy among the acoustic modes is evaluated. This work is a first step in the attempt to relate the excitation of the Sun's acoustic modes to the turbulence in the solar convection zone. Publication: The Astrophysical Journal Pub Date: March 1988 DOI: 10.1086/166108 Bibcode: 1988ApJ...326..462G Keywords: Magnetohydrodynamic Turbulence; Solar Oscillations; Sound Waves; Turbulent Flow; Absorptivity; Convection; Electrodynamics; Wave Interaction; Solar Physics; HYDRODYNAMICS; SUN: OSCILLATIONS; TURBULENCE full text sources ADS |
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