منابع مشابه
Roughness-induced critical phenomena in a turbulent flow.
I present empirical evidence that turbulent flows are closely analogous to critical phenomena, from a reanalysis of friction factor measurements in rough pipes. The data collapse found here corresponds to Widom scaling near critical points, and implies that a full understanding of turbulence requires explicit accounting for boundary roughness.
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In this paper, we propose a method for turbulence characterization using sparse representation of channel’s impulse response. We consider the case of moving vortices created naturally or artificially that do not conserve their physical properties when observed at two distinct positions in space. Existing amplitude–based techniques fail to provide an accurate representation when the physical pro...
متن کاملInfluence of scale-breaking phenomena on turbulent mixing rates.
Simulations not seen before compare turbulent mixing rates for ideal fluids and for real immiscible fluids with experimental values for the surface tension. The simulated real fluid mixing rates lie near the center of the range of experimental values. A comparison to theoretical predictions relating the mixing rate, the bubble width, and the bubble height fluctuations based on bubble merger mod...
متن کاملSome Qualitative Features of Turbulent Mixing for Far from Equilibrium Phenomena
The turbulence phenomenon is a modern component of fluid kinematics. In this area, the turbulent mixing is distinguished by its importance in applied engineering (including technical, social, economic applications). The turbulent mixing is an important feature of far from equilibrium models.Studying a mixing for a flow implies the analysis of successive stretching and folding phenomena for its ...
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ژورنال
عنوان ژورنال: Nature Physical Science
سال: 1972
ISSN: 0300-8746,2058-1106
DOI: 10.1038/physci240024b0