Comprehensive spectral analysis of a fluid model for trapped electron mode TEM turbulence reveals that marginally stable zonal modes at infinitesimal amplitude become robustly damped at finite amplitude. Zonal-mode structure, anisotropy, excitation, and wave number spectra are shown to result from interaction of the zero-frequency drift wave with the density advection nonlinearity. Heuristic di...

Angle of arrival fluctuations are one manifestation of acoustic propagation through a turbulent flow. Here the two-dimensional angle of arrival distribution for a 670-m acoustic path through a high Reynolds number flow in a tidal channel is examined and its origin and relationship to the flow field is determined. Over scales greater than the variability due to turbulence, a solution of the ray ...

We study the variation of average powers and spectral indices electric field fluctuations with respect to angle between flow direction mean magnetic in solar wind turbulence. Cluster spacecraft data from years 2002 2007 are used for present analysis. perform a scale dependent local using wavelet analysis technique. Prominent anisotropies found both index power levels spectra. Similar fluctuatio...

Studies on particle distributions and interactions between the particles and the liquid turbulence are extremely significant and can help to improve efficiency of industrial processes and final product quality. In this paper, the particle distribution and the particle–turbulence interaction in the solid–liquid flow were investigated in detail by a numerical method. The governing equations of th...