Coherent structures of the near field flow in a self-oscillating physical model of the vocal folds

2007 ◽  
Vol 121 (2) ◽  
pp. 1102-1118 ◽  
Author(s):  
Jürgen Neubauer ◽  
Zhaoyan Zhang ◽  
Reza Miraghaie ◽  
David A. Berry
Keyword(s):  
Physical Model ◽  
Coherent Structures ◽  
Near Field ◽  
Vocal Folds

Aerodynamically and acoustically driven modes of vibration in a physical model of the vocal folds

2006 ◽  
Vol 120 (5) ◽  
pp. 2841-2849 ◽  
Author(s):  
Zhaoyan Zhang ◽  
Juergen Neubauer ◽  
David A. Berry
Keyword(s):  
Physical Model ◽  
Vocal Folds ◽  
Modes Of Vibration

Three-dimensionality of organized structures in a plane turbulent wake

1989 ◽  
Vol 206 ◽  
pp. 375-404 ◽  
Author(s):  
Michio Hayakawa ◽  
Fazle Hussain
Keyword(s):  
Cross Sections ◽  
Coherent Structures ◽  
Near Field ◽  
Spatial Coherence ◽  
Three Dimensional ◽  
Quantitative Measure ◽  
Turbulent Wake ◽  
Topological Features ◽  
Plane Wake ◽  
Plane Turbulent Wake

This paper describes a quantitative study of the three-dimensional nature of organized motions in a turbulent plane wake. Coherent structures are detected from the instantaneous, spatially phase-correlated vorticity field using certain criteria based on size, strength and geometry of vortical structures. With several combinations of X-wire rakes, vorticity distributions in the spanwise and transverse planes are measured in the intermediate region (10d [les ] x [les ] 40d) of the plane turbulent wake of a circular cylinder at a Reynolds number of 13000 based on the cylinder diameter d. Spatial correlations of smoothed vorticity signals as well as phase-aligned ensemble-averaged vorticity maps over structure cross-sections yield a quantitative measure of the spatial coherence and geometry of organized structures in the fully turbulent field. The data demonstrate that the organized structures in the nominally two-dimensional wake exhibit significant three-dimensionality even in the near field. Using instantaneous velocity and vorticity maps as well as correlations of vorticity distributions in different planes, some topological features of the dominant coherent structures in a plane wake are inferred.

Physical model for near-field scattering and manipulation

2004 ◽  
Author(s):  
Djenan Ganic ◽  
Xiaosong Gan ◽  
Min Gu
Keyword(s):  
Physical Model ◽  
Near Field

scholarly journals Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation

2008 ◽  
Vol 124 (5) ◽  
pp. 3296-3308 ◽  
Author(s):  
Lucie Bailly ◽  
Xavier Pelorson ◽  
Nathalie Henrich ◽  
Nicolas Ruty
Keyword(s):  
Physical Modeling ◽  
Experimental Validation ◽  
Near Field ◽  
Vocal Folds

Coherent Structures in a Three-Dimensional Wall Jet

1990 ◽  
Vol 112 (4) ◽  
pp. 462-467 ◽  
Author(s):  
Hisashi Matsuda ◽  
Sei-ichi Iida ◽  
Michio Hayakawa
Keyword(s):  
Coherent Structures ◽  
Large Scale ◽  
Near Field ◽  
Three Dimensional ◽  
Sampling Technique ◽  
Wall Jet ◽  
Structure Model ◽  
Streamwise Vortices ◽  
Lateral Velocity ◽  
Circular Nozzle

The formation mechanism of streamwise vortices in the near field of the three-dimensional wall jet discharging from a circular nozzle along a flat plate is studied experimentally using a conditional sampling technique. Ensemble-averages of the lateral velocity component indicate the presence of large-scale horseshoe-like structures, whose legs are inclined and stretched to form the streamwise vortices in the mixing region of the jet. Based on the present result, a coherent structure model for the near field of the wall jet is proposed.

Coherent structures in the near-field of swirling turbulent jets: A tomographic PIV study

2018 ◽  
Vol 70 ◽  
pp. 363-379 ◽  
Author(s):  
Sergey V. Alekseenko ◽  
Sergey S. Abdurakipov ◽  
Mikhail Y. Hrebtov ◽  
Mikhail P. Tokarev ◽  
Vladimir M. Dulin ◽  
...  
Keyword(s):  
Coherent Structures ◽  
Near Field ◽  
Turbulent Jets ◽  
Tomographic Piv
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