Nonlinear Dynamics of Gravity Wave Driven Flows in the Solar Radiative Interior

Details Nonlinear Dynamics of Gravity Wave Driven Flows in the Solar Radiative Interior Nonlinear Dynamics of Gravity Wave Driven Flows in the Solar Radiative Interior

2008-04-12

arxiv.org/abs/0804.1987v1

Astronomy and Astrophysics

Astrophysics

21 pages, 10 figures, accepted to MNRAS animations can be found at http://www.solarphysicist.com

Scientific paper

10.1111/j.1365-2966.2008.13289.x

We present results of nonlinear numerical simulations of gravity wave driven shear flow oscillations in the equatorial plane of the solar radiative interior. These results show that many of the assumptions of quasi-linear theory are not valid. When only two waves are forced (prograde and retrograde) oscillatory mean flow is maintained; but critical layers often form and are dynamically important. When a spectrum of waves is forced, the non-linear wave-wave interactions are dynamically important, often acting to decrease the maintenance of a mean flow. The (in)coherence of such wave-wave interactions must be taken into account when describing wave driven mean flows.

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