scholarly journals Topological bifurcations of vortex pair interactions

2021 ◽  
Vol 917 ◽  
Author(s):  
Anne R. Nielsen ◽  
Morten Andersen ◽  
Jesper S. Hansen ◽  
Morten Brøns
Keyword(s):  
Vortex Pair ◽  
Pair Interactions

Abstract

scholarly journals Vorticity topology of vortex pair interactions at low Reynolds numbers

2019 ◽  
Vol 74 ◽  
pp. 58-67
Author(s):  
Morten Andersen ◽  
Cédric Schreck ◽  
Jesper Schmidt Hansen ◽  
Morten Brøns
Keyword(s):  
Vortex Pair ◽  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Low Reynolds ◽  
Pair Interactions

Effects of Heat Release on Diffusion Flame-Vortex Pair Interactions

1988 ◽  
Vol 61 (1-3) ◽  
pp. 101-119 ◽  
Author(s):  
B. V. S. MANDA ◽  
A. R. KARAGOZIAN
Keyword(s):  
Heat Release ◽  
Diffusion Flame ◽  
Vortex Pair ◽  
Pair Interactions

Large-eddy simulations and lidar measurements of vortex-pair breakup in aircraft wakes

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 1439-1445 ◽  
Author(s):  
D. C. Lewellen ◽  
W. S. Lewellen ◽  
L. R. Poole ◽  
C. A. Hostetler ◽  
R. J. DeCoursey ◽  
...  
Keyword(s):  
Vortex Pair ◽  
Large Eddy Simulations ◽  
Large Eddy ◽  
Lidar Measurements

Effects of interionic pair interactions on atomic transport properties of liquid Al

2021 ◽  
Author(s):  
M. A. Mohaiminul Islam ◽  
R. C. Gosh ◽  
Fysol Ibna Abbas ◽  
G. M. Bhuiyan
Keyword(s):  
Transport Properties ◽  
Atomic Transport ◽  
Pair Interactions

Study on the influence of linear and nonlinear distribution of crosswind on the motion of aircraft wake vortex

2021 ◽  
pp. 095441002098743
Author(s):  
Dong Li ◽  
Ziming Xu ◽  
Ke Zhang ◽  
Zeyu Zhang ◽  
Jinxin Zhou ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Dissipation Rate ◽  
Vortex Pair ◽  
Vertical Shear ◽  
Wake Vortex ◽  
Analysis Method ◽  
Velocity Magnitude ◽  
Aircraft Wake ◽  
Linear And Nonlinear ◽  
Nonlinear Distribution

Environmental crosswind can greatly affect the development of aircraft wake vortex pair. Previous numerical simulations and experiments have shown that the nonlinear vertical shear of the crosswind velocity can affect the dissipation rate of the aircraft wake vortex, causing each vortex of the vortex pair descent with different velocity magnitude, which will lead to the asymmetrical settlement and tilt of the wake vortex pair. Through numerical simulations, this article finds that uniform crosswind convection and linear vertical shear crosswind convection can also have an effect on the strength of the vortex. This effect is inversely proportional to the cube of the vortex spacing, so it is more intense on small separation vortex pair. In addition, the superposition of crosswind and vortex-induced velocities will lead to the asymmetrical pressure distribution around the vortex pair, which will also cause the tilt of the vortex pair. Furthermore, a new analysis method for wake vortex is proposed, which can be used to predict the vortex trajectory.

scholarly journals Instability and merging of a helical vortex pair in the wake of a rotor

2021 ◽  
Vol 1934 (1) ◽  
pp. 012007
Author(s):  
D Schröder ◽  
T Leweke ◽  
R Hörnschemeyer ◽  
E Stumpf
Keyword(s):  
Vortex Pair ◽  
Helical Vortex

Experimental determination of pair interactions in aFe0.804V0.196single crystal

1995 ◽  
Vol 51 (9) ◽  
pp. 5760-5767 ◽  
Author(s):  
V. Pierron-Bohnes ◽  
E. Kentzinger ◽  
M. C. Cadeville ◽  
J. M. Sanchez ◽  
R. Caudron ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Pair Interactions

scholarly journals The approach of a vortex pair to a plane surface in inviscid fluid

1979 ◽  
Vol 92 (3) ◽  
pp. 497-503 ◽  
Author(s):  
P. G. Saffman
Keyword(s):  
Approximate Calculation ◽  
Plane Surface ◽  
Vortex Pair ◽  
Plane Wall ◽  
Inviscid Fluid ◽  
Viscous Effects ◽  
Axis Ratio ◽  
Local Rate

It is shown that a symmetrical vortex pair consisting of equal and opposite vortices approaching a plane wall at right angles must approach the wall monotonically in the absence of viscous effects. An approximate calculation is carried out for uniform vortices in which the vortices are assumed to be deformed into ellipses whose axis ratio is determined by the local rate of strain according to the results of Moore & Saffman (1971).

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