Titlebook: IUTAM Symposium on Elementary Vortices and Coherent Structures: Significance in Turbulence Dynamics; Proceedings of the I SHIGEO KIDA Confe

衰老

VORTEX STRUCTURES IN A ROUGH-WALL CHANNEL FLOWAND THEIR INFLUENCE ON PASSIVE SCALARtion of the roughness elements. The passive scalar is also evaluated. The high correlation coefficients between vorticity and scalar gradients, in the wall layer, emphasize that in all cases flow visualizations can be used in a laboratory to have a qualitative picture of the modifications of the hig

backdrop

效果

Dedication

ON THE POSSIBLE EXISTENCE OF A CO-SUPPORTING CYCLE OF LARGE-SCALE AND NEAR-WALL STRUCTURES IN WALL Tried out at Reynolds number Reτ = 349. The large-scale structures previously observed in studies of turbulent channel flow using huge computational domains are also shown to exist even in the streamwise-minimal channel of the present work. In the system, it is also clearly observed how the large-sca

佛刊

后退

VORTEX TUBES IN VELOCITY FIELDS OF LABORATORY TURBULENCE AT HIGH REYNOLDS NUMBERSReλ = 295– 1258. We conduct conditional averaging for enhancements of a small-scale velocity increment and obtain the typical velocity profile for vortex tubes. Their radii are of the order of the Kolmogorov length. Their circulation velocities are of the order of the root-mean-square velocity fluct

技術

LOCAL VORTEX IDENTIFICATION CRITERIA: INTER-RELATIONSHIPS AND A UNIFIED OUTLOOKreafter referred to as CBA05). The inter-relationships between the various local criteria are summarized and the notion of ‘equivalent thresholds’ is applied to two canonical turbulent flows: sphere wake and channel flow. Remarkably similar vortex structures are extracted using the ‘equivalent thres

mutineer

PERSISTENT MULTIPLE-SCALE STAGNATION POINT STRUCTURE dimensionless constant, ./. is the inner to outer length-scale ratio and the fractal dimension . is given by . + 2./. = 3; . is the dimensionality of the flow and . is the exponent of the energy spectrum. On the other hand, the statistical persistence of stagnation points is defined in terms of the

isotope

dissolution