论文标题
复杂对流中的分层与湍流
Stratification versus turbulence in complex convection
论文作者
论文摘要
自然对流通常会因旋转，剪切，辐射转移，可压缩性和电磁场（对于电导流体而言）等其他因素而复杂。使用数值模拟的结果和大气边界层和太阳光球的测量结果显示，强的分层可以将湍流转化为具有指数光谱衰减的确定性混乱。当分层变得较弱时，确定性的混乱被分布的混乱所取代，由伸展的指数衰减由螺旋分布的第二或第三矩控制。
Natural convection is usually complicated by additional factors such as rotation, shear, radiative transfer, compressibility and electromagnetic fields (in the case of electro-conductive fluids). It is shown, using results of numerical simulations and measurements in atmospheric boundary layer and solar photosphere that strong stratification can transform turbulence into deterministic chaos with exponential spectral decay of kinetic energy. When the stratification becomes weaker the deterministic chaos is replaced by the distributed chaos with stretched exponential spectral decay controlled by the second or third moments of the helicity distribution.
