Non-linear dynamics of gravity wave driven flows in the solar radiative interior
Non-linear dynamics of gravity wave driven flows in the solar radiative interior
复制标题
太阳辐射内部重力波驱动流的非线性动力学
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
G. Glatzmaier
中科院分区：
文献类型：
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作者：
T. Rogers;K. Macgregor;G. Glatzmaier
本文给出了太阳辐射内部赤道平面内重力波驱动的切变流振荡的非线性数值模拟结果。这些结果表明，许多准线性理论的假设是不成立的。当只有两个波被迫（顺向和逆行）振荡平均ow维持，但关键层往往形成，并在动力学上很重要。当一个波浪谱被强迫时，非线性的波-波相互作用在动力学上是重要的，常常起着减少平均流维持的作用。在描述波驱动平均值时，必须考虑这种波-波相互作用的（非）相干性。
We present results of nonlinear numerical simulations of gravity wave driven shear ow 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 ow 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 ow. The (in)coherence of such wave-wave interactions must be taken into account when describing wave driven mean ows.