نتایج جستجو برای: air core vortices

تعداد نتایج: 426321  

Journal: :Physical Review Letters 2021

If a quantum fluid is driven with enough angular momentum, at equilibrium the ground state of system given by lattice quantised vortices whose density prescribed quantization circulation. We report on first experimental study Feynman-Onsager relation in non-equilibrium polariton fluid, free to expand and rotate. Upon initially imprinting we track vortex core positions picosecond time scales. ob...

Journal: :مکانیک سیالات و آیرودینامیک 0
امین حدیدی محمدرضا انصاری

in this study, the effects of strength and direction of the magnetic field on lid-driven cavity flow in the whole range of magnetic field strength variations, which already used in practice up to present (0 to 10 tesla), are studied. the governing equations, including conservative equations of momentum, continuity and magnetic field equations were solved numerically. momentum and continuity equ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Kaori Tanaka István Robel Boldizsár Jankó

We report self-consistent calculations of the microscopic electronic structure of the so-called giant vortex states. These multiquantum vortex states, detected by recent magnetization measurements on submicron disks, are qualitatively different from the Abrikosov vortices in the bulk. We find that, in addition to multiple branches of bound states in the core region, the local tunneling density ...

Journal: :Physical review letters 1996
Blatter Feigel'man Geshkenbein Larkin van Otterlo A

In a type II superconductor the gap variation in the core of a vortex line induces a local charge modulation. Accounting for metallic screening, we determine the line charge of individual vortices and calculate the electric field distribution in the half space above a field penetrated superconductor. The resulting field is that of an atomic size dipole d ∼ eaBẑ, aB = h̄/me is the Bohr radius, ac...

Journal: :Physical review letters 2003
Kenichi Kasamatsu Makoto Tsubota Masahito Ueda

We investigate the structure of vortex states in rotating two-component Bose-Einstein condensates with equal intracomponent but varying intercomponent-coupling constants. A phase diagram in the intercomponent-coupling versus rotation-frequency plane reveals rich equilibrium structures of vortex states. As the ratio of intercomponent to intracomponent couplings increases, the interlocked vortex ...

Arezo Esmaelzadeh, Farzad Ebrahemzadeh, Nayereh Naeimi, Rajab Rashidi, Sakineh Mahdavi,

Background & Aims of the Study: Heat Stress is a major factor in many industrials and heat stress is one of occupational hazards in the workplace and severely affects the health and productivity, heat stress can decrease efficiency, increase accidents and reduce safety levels. Aim of this study was comparing the heat stress indices of HSI and WBGT and core body temperature in steels ind...

Journal: :international journal of environmental research 2011
p. wang d. zhao w. wang h. mu g. cai

his investigation was carried out to reveal the impact of solar radiation on wind flow structure and pollutant dispersion in an urban street canyon of aspect ratio of one using the computational fluid dynamic (cfd) technique. the simulation results (velocity and concentration data) show that heating from building wall surfaces and ground lead to strong buoyancy forces as the air is heated by th...

Journal: :The Journal of experimental biology 2000
U K Müller E J Stamhuis J J Videler

Zebra danios (Brachydanio rerio) swim in a burst-and-coast mode. Most swimming bouts consist of a single tail flick and a coasting phase, during which the fish keeps its body straight. When visualising the flow in a horizontal section through the wake, the effects of the flow regime become apparent in the structure of the wake. In a two-dimensional, medio-frontal view of the flow, larvae and ad...

بحرینی داورانی, فاطمه , پورمحمّد , داود ,

  Secondary electrons at ground level of simulated extensive air showers have been analyzed using a wavelet transform based technique, in order to investigate the variation of fractal dimensions of the lateral distribution of the electrons with shower energy and primary particle mass number. The fractal dimension is shown to increase with shower energy and seems to saturate to constant values n...

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