Influence of a Stochastic Flow on Acoustic Waves

Details Influence of a Stochastic Flow on Acoustic Waves Influence of a Stochastic Flow on Acoustic Waves

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aca....50..269m&link_type=abstract

Acta Astronomica, v.50, pp.269-277, (2000).

Computer Science

Sound

2

Convection, Sun: Atmosphere, Sun: Granulation, Sun: Oscillations, Turbulence

Scientific paper

An influence of a random flow on frequencies and amplitudes of the acoustic oscillations is examined on the basis of numerical simulations for the linear hydrodynamic equations.The case of the random flow that is parallel to the direction of a wave propagation is discussed for various parameters of the random field. The numerical results reveal that the sound waves can be both amplified and damped by the random flow as well as their frequencies can be higher and lower than frequencies of the coherent acoustic waves. These effects are more pronounced for stronger random flow. Spectral properties of the sound waves depend on a flow pattern.

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