Results 1 to 10 of about 16,273 (182)

Vortex Streets on a Sphere [PDF]

Journal of Applied Mathematics, 2011
We consider flows on a spherical surface and use a transformation to transport some well-known periodic two-dimensional vortex streets to that spherical surface to arrive at some new expressions for vortex streets on a sphere.
Ghada Alobaidi, Roland Mallier
doaj   +4 more sources

Interaction of vortex streets with a downstream wing [PDF]

Physical Review Fluids, 2022
The unsteady aerodynamics of a wing in the wake of a periodically plunging upstream airfoil was investigated in water tunnel experiments. By varying the frequency and the amplitude of the plunge oscillations, vortex-street configurations with varying wavelength and circulation were generated.
Burak Turhan, Z Wang, Ismet Gürsul
exaly   +2 more sources

A SAR Observation and Numerical Study on Ocean Surface Imprints of Atmospheric Vortex Streets [PDF]

Sensors, 2008
The sea surface imprints of Atmospheric Vortex Street (AVS) off Aleutian Volcanic Islands, Alaska were observed in two RADARSAT-1 Synthetic Aperture Radar (SAR) images separated by about 11 hours.
William G. Pichel, Cheng-Zhi Zou, Weizhong Zheng, Xiaofeng Li   +3 more
doaj   +2 more sources

Ultrafast bursts of tailored spatiotemporal vortex pulses [PDF]

Light: Science & Applications
Orbital angular momentums (OAMs) of light can be categorized into longitudinal OAM (L-OAM) and transverse OAM (T-OAM). Light carrying time-varying L-OAM, known as self-torqued light, was recently discovered during harmonic generation and has been ...
Xin Liu, Chunhao Liang, Qian Cao, Yangjian Cai, Qiwen Zhan   +4 more
doaj   +2 more sources

Unraveling deep-learning detection of atmospheric Kármán vortex streets: dataset, baseline benchmarking, and optimization

Big Earth Data
Atmospheric Kármán vortex streets, which frequently emerge on the leeward side of isolated islands under specific atmospheric conditions, play a critical role in large-scale atmospheric dynamics.
Daoyi Chen
exaly   +3 more sources

Nonstationary Vortex Streets in Shear Flows

Izvestiya - Atmospheric and Oceanic Physics, 2019
Spatially periodic vortex systems that form due to unstable shear flows are called vortex streets. A number of exact and asymptotic solutions of two-dimensional hydrodynamic equations describing nonstationary vortex streets have been constructed. It is shown that the superposition of the flow with a constant horizontal shear and its perturbations in ...
M V Kalashnik, O G Chkhetiani
exaly   +3 more sources

A New Theory of Vortex Streets [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 1952
Garrett Birkhoff
exaly   +3 more sources

Vortex streets to the lee of Madeira in a kilometre-resolution regional climate model [PDF]

Weather and Climate Dynamics, 2023
Atmospheric vortex streets are a widely studied dynamical effect of isolated mountainous islands. Observational evidence comes from case studies and satellite imagery, but the climatology and annual cycle of vortex shedding are often poorly understood ...
Q. Gao, Q. Gao, Q. Gao, C. Zeman, J. Vergara-Temprado, J. Vergara-Temprado, D. C. A. Lima, P. Molnar, C. Schär   +8 more
doaj   +1 more source

Effect of Flexibility on the Motion State of Filament in Vortex Streets

Hangkong gongcheng jinzhan, 2022
In vortex streets,the motion state of filaments is closely related to its propulsion performance. Studying the influence of flexibility on the motion state of filaments in vortex streets can provide reference for flexible design of flexible aircraft in ...
LIU Liang, HE Guoyi, HE Xinyi, WANG Qi
doaj   +1 more source

Oceanic Kármán Vortex Streets in the Luzon Strait in the Lee of Didicas Island from Multiple Satellite Missions

Remote Sensing, 2022
The oceanic Kármán vortex street is an important hydrokinetic phenomenon caused by the unsteady separation of sea currents in the wake of an obstacle.
Fenfen Liu, Yiting Liu, Shilin Tang, Qiqing Li   +3 more
doaj   +1 more source