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

潰爛

PERIODIC MOTION IN HIGH-SYMMETRIC FLOWr attained in the continuation we compare the energy spectra of periodic and turbulent motion. The results suggest that periodic motion of a sufficiently long period can represent turbulence in a statistical sense.

Amenable

ATOPY

種子

TWO-PARTICLE DIFFUSION AND FINE-SCALE STRUCTURES OF TURBULENCE straining stagnation points; . is a dimensionless number). It is also shown that the trajectories of particlepairs in the (.,.) space are useful to recognize the fine-scale structure bearing the Lagrangian burst of particle-pair.

meretricious

象形文字

CHANT

CLUSTERING OF INTENSE STRUCTURES IN ISOTROPIC TURBULENCE: NUMERICAL AND EXPERIMENTAL EVIDENCErticity and strain rate sets gives evidence of a strong clustering at intermediate scales, from which a possible fractal dimension can be defined. Algebraically distributed free intervals between intense velocity derivative from experimental time series confirms this self-similar clustering at large

EXPEL

鞏固

Indicative

INTERACTION BETWEEN A COLUMNAR VORTEX AND EXTERNAL TURBULENCEortex are used. The columnar vortex is immersed in an initially isotropic homogeneous turbulence field, which itself is produced by a direct numerical simulation of decaying turbulence. Using visualization techniques, we investigate the formation of inhomogeneous fine turbulent eddies around the col