Results 31 to 40 of about 16,312 (221)

The structure of Kármán vortex streets in the atmospheric boundary layer derived from large eddy simulation

Meteorologische Zeitschrift, 2012
Kármán vortex streets generated in the wake of an idealized island are studied using large eddy simulation (LES). Simulations were carried out under conditions of a dry convective boundary layer, capped by an inversion below the island top.
Rieke Heinze, Siegfried Raasch, Dieter Etling   +2 more
doaj   +1 more source

Influence of Urban Road Green Belts on Pedestrian-Level Wind in Height-Asymmetric Street Canyons

Atmosphere, 2022
This study was conducted to examine the effect on airflow of the shape of an urban road green belt in an asymmetrical street canyon. In this paper, the airflow field at pedestrian height in an asymmetrical street with different building height ratios ...
Fanhao Zeng, David Simeja, Xinyi Ren, Zhonggou Chen, Hanyi Zhao   +4 more
doaj   +1 more source

A model for the symmetry breaking of the reverse Benard-von Karman vortex street produced by a flapping foil

, 2008
The vortex streets produced by a flapping foil of span-to-chord aspect ratio of 4:1 are studied in a hydrodynamic tunnel experiment. In particular, the mechanisms giving rise to the symmetry breaking of the reverse B\'enard-von K\'arm\'an vortex street ...
CATHERINE MARAIS, JEAN-LUC AIDER, JOSÉ EDUARDO WESFREID, RAMIRO GODOY-DIANA, Saffman   +4 more
core   +1 more source

Influence of attack angle on vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement

Advances in Mechanical Engineering, 2019
The vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement with different attack angles are numerically investigated using two-dimensional unsteady Reynolds-Averaged Navier–Stokes simulations.
Li Zhang, Xinru Mao, Lin Ding
doaj   +1 more source

Optimal Strouhal number for swimming animals [PDF]

, 2011
To evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = fA/U, with f the tail-beat frequency, A the peak-to-peak tail amplitude, and U the swimming velocity.
Abramowitz, Anderson, Anderson, Archer, Bainbridge, Bainbridge, Barrett, Blake, Blickhan, Borazjani, Brett, Bénard, Candelier, Cheng, Christophe Eloy, D'Août, D'Août, Dewar, Dickson, Doaré, Donley, Dowis, Ellerby, Fish, Fish, Fish, Gillis, Gillis, Gray, Hess, Horner, Huerre, Hunter, Jayne, Jordan, Kayan, Kern, Kojeszewski, Koochesfahani, Lauder, Liao, Lighthill, Lighthill, Long, Long, Long, Lowe, McMillen, Müller, Müller, Müller, Nauen, Parrish, Pier, Rayleigh, Read, Rinaldi, Rohr, Schouveiler, Schultz, Seebacher, Sfakiotakis, Shirgaonkar, Strouhal, Taylor, Triantafyllou, Triantafyllou, Triantafyllou, Tytell, Videler, Videler, Videler, Videler, Wardle, Wassersug, Webb, Webb, Webb, Webb, Webb, Webb, Webb, Webb, Webber, Wu, Wu, Yuen   +86 more
core   +3 more sources

Enhancing Kármán Vortex Street Detection via Auxiliary Networks Incorporating Key Atmospheric Parameters

Atmosphere
Kármán vortex streets are quintessential phenomena in fluid dynamics, manifested by the periodic shedding of vortices as airflow interacts with obstacles.
Yihan Zhang, Zhi Zhang, Qiao Su, Chaoyue Wu, Yuqi Zhang, Daoyi Chen   +5 more
doaj   +1 more source

Mechanism of aerodynamic force generation concerning train vibration in tunnel (LES of large-scale flow structure around simplified train model)

Nihon Kikai Gakkai ronbunshu, 2020
To clarify the mechanisms underlying airflow-induced vibrations of high-speed trains running through tunnels, large-eddy simulation of a large-scale flow structure around a simplified 6-car train model was conducted.
Koji NAKADE, Yutaka SAKUMA, Takeo KAJISHIMA   +2 more
doaj   +1 more source

On the Evolution of Thermonuclear Flames on Large Scales [PDF]

, 2006
The thermonuclear explosion of a massive white dwarf in a Type Ia supernova explosion is characterized by vastly disparate spatial and temporal scales. The extreme dynamic range inherent to the problem prevents the use of direct numerical simulation and ...
Alexei M. Khokhlov, Ju Zhang, O. E. Bronson Messer, Reinecke M., Tomasz Plewa   +4 more
core   +2 more sources

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Evolution of Physical Intelligence Across Scales

Advanced Intelligent Discovery, EarlyView.
By following the evolution of physical intelligence across scales, this article shows how intelligence arises from materials, structures, physical interactions, and collectives. It establishes physical intelligence as the evolutionary foundation upon which embodied intelligence is built.
Ke Liu, Tianyun Huang, Aming Li, Pengyu Lv, Tingting Qin, Wenhui Chen, Hui Wei, Huiling Duan   +7 more
wiley   +1 more source