Riassunto
Elementary vortices – those tubular swirling vortical structures with concentrated vorticity commonly observed in various kinds of turbulent flows – play key roles in turbulence dynamics (e.g. enhancement of mixing, diffusion and resistance) and characterize turbulence statistics (e.g. intermittency). Because of their dynamical importance, manipulation of elementary vortices is expected to be effective and useful in turbulence control as well as in construction of turbulence modeling. The most advanced research works on elementary vortices and related problems were presented and discussed at the IUTAM Symposium in Kyoto, Japan, 26-28 October 2004. This book contains 40 contributions presented there, the subjects of which cover vortex dynamics, coherent structures, chaotic advection and mixing, statistical properties of turbulence, rotating and stratified turbulence, instability and transition, dynamics of thin vortices, finite-time singularity, and superfluid turbulence. The book should be useful for readers of graduate and advanced levels in the field of fluid turbulence.
Contenuti
Preface; Part A Vortex Dynamics: Clustering of intense structures in isotropic turbulence: numerical and experimental evidence, by Frédéric Moisy & Javier Jiménez; Multi modes for the vortex sheet-tube transformation process and viscoelastic effect, by Kiyosi Horiuti, Yohei Takagi & Syouji Abe; Dynamics of small-scale vorticity and strain-rate structures in the transition from isotropic to shear turbulence, by James G. Brasseur & Winston Lin; Interaction between a columnar vortex and external turbulence, by Naoya Takahashi & Takeshi Miyazaki;Vortex structures in a rough-wall channel flow and their influence on passive scalar, by Paolo Orlandi, Stefano Leonardi & Robert Anthony Antonia; Part B Coherent Structures: The near-wall structures of turbulent wall flows, by Javier Jiménez, Genta Kawahara, Mark P. Simens & Juan C. del Alamo; Coherent fine scale eddies in the logarithmic region of turbulent channel flows, by Toshio Miyauchi, Shin-Jeong Kang & Mamoru Tanahashi; On the possible existence of a co-supporting cycle of large-scale and near-wall structures in wall turbulence, by Tomoaki Itano & Sadayoshi Toh; Periodic motion in high-symmetric flow, by Lennaert van Veen, Shigeo Kida & Genta Kawahara; Vortex tubes in velocity fields of laboratory turbulence at high Reynolds numbers, by Hideaki Mouri, Akihiro Hon & Yoshihide Kawashima; Local vortex identification criteria: inter-relationships and a unified outlook, by Pinaki Chakraborty, S. Balachandar & Ronald J. Adrian; Part C Chaotic advection and mixing: Persistent multiple-scale stagnation point structure, by J.C. Vassilicos, J. Davila, S. Goto, E. Hascoet, D. Osborne & L. Rossi; Streamlines, coherent vortices and pair diffusion in two-dimensional turbulence Susumu Goto & J.C. Vassilicos; Self-similarity of ballistically separating motions in turbulentrelative dispersion, by Takeshi Ogasawara & Sadayoshi Toh; Two-particle diffusion and fine-scalestructures of turbulence, by Yasuhiko Sakai, Haruka Kuwahara, Kazuki Maeyama & Hiroyuki Tsunoda; Flow due to a point vortex in an oscillating and rotating straining flow, by Konrad Bajer & Michal Branicki; Part D Statistical properties of turbulence: Statistical property of pressure fluctuation in fully developed Turbulence, by Yoshiyuki Tsuji & Takashi Ishihara; Intermittency, field structures and accuracy of DNS in a passive scalar turbulence, by Takeshi Watanabe & Toshiyuki Gotoh; Self-similarity of vorticity dynamics in decaying two-dimensional turbulence, by Takahiro Iwayama & Theodore G. Shepherd; A grid-free redistribution model for a vortex method and turbulent flow analysis, by Kota Fukuda & Kyoji Kamemoto; Part E Rotating and stratified turbulence: A new twist to rotating stratified turbulence, by David G. Dritschel & William J. McKiver; Energy cascade processes in stratified turbulence, by Yuji Kitamura & Yoshihisa Matsuda; Asymmetrization of Jet Profiles in /3-plane Turbulence, by Jitsuko Hasegawa, Keiichi Ishioka & Shigeo Yoden; Dynamics of velocity field in developed thermal turbulence, by Takashi Mashiko, Yoshiyuki Tsuji & Masaki Sano; Instability of co-rotating vertical vortices in a stratified fluid, by Pantxika Otheguy, Paul Billant & Jean-Marc Chomaz; Action of coherent vortices in rotating duct flows, by Yoshito Kaga & Shinichiro Yanase; Part F Instability and transition: Instability of low-speed streaks leading to wall turbulence, by Masahito Asai & Yasufumi Konishi; The turbulent energy cascade built by a vortex burst, by Yannis Cuypers, Philippe Petitjeans & Agnes Maurel; Mixing transition in supersonic streamwise vortices, by Michio Nishioka, Shoji Sakaue, Kazuya Komada, Hiroyuki Sakoshi & Ikuhiro Furukawa; Evolution of vortex structures in a model of the turbulent trailing vortex, by J. M. Faddy & D. I. Pullin; Helical modes in swirling jets, by Jean-Marc Chomaz & F
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