Results 1 to 10 of about 66,556 (207)

Longitudinal vortex rolls in fluids [PDF]

Journal of Heat and Mass Transfer Research, 2020
This paper is concerned with longitudinal vortex rolls in fluids. The longutudinal rolls are observed in the sea surface, desert, and atmosphere. However, origin of the vortical motions are not clear, so that in this study laboratory experiments and ...
Takeo Nakagawa, Ai Nakagawa
doaj   +2 more sources

Longitudinal topological manipulations of vortex fields via nested spiral arrays [PDF]

iScience
Summary: Vortex beams, characterized by their helical phase wavefronts, hold great promise in optical information science and light-matter interactions.
Ying Wang, Jianmin Wu, Li Ma, Jianwei Liu   +3 more
doaj   +2 more sources

Longitudinal observation of left ventricular inflow reorientation with preserved vorticity after myocardial infarction in a porcine model [PDF]

Frontiers in Cardiovascular Medicine
BackgroundThe evolution of left ventricular (LV) intracardiac flow characteristics following myocardial infarction (MI), and their relationship to LV remodeling, remains incompletely understood, particularly from longitudinal in vivo observations with ...
Sungho Park, Sungho Park, Yura Ahn, Minseong Kwon, Hyun Jung Koo, Dong Hyun Yang, Hyungkyu Huh   +6 more
doaj   +2 more sources

Mutual friction and vortex Hall angle in a strongly interacting Fermi superfluid [PDF]

Nature Communications
We investigate the two-dimensional motion of a single vortex orbiting a pinned anti-vortex in a unitary Fermi superfluid. By analyzing its trajectory, we measure the yet-unknown longitudinal and transverse mutual friction coefficients, which quantify the
N. Grani, D. Hernández-Rajkov, C. Daix, P. Pieri, M. Pini, P. Magierski, G. Wlazłowski, M. Frómeta Fernández, F. Scazza, G. Del Pace, G. Roati   +10 more
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Effect of blade tip on torque characteristics of circular cylinder blade wind turbine driven by longitudinal vortex

Nihon Kikai Gakkai ronbunshu, 2022
In a circular cylinder blade wind turbine driven by a longitudinal vortex, the torque characteristics of the turbine are greatly affected by the flow field at the blade tip. In general, wind turbines reduce drag by making the blade tips thinner. However,
Shota NAKADA, Yasunori SATO, Tsutomu TAKAHASHI   +2 more
doaj   +1 more source

Numerical Study on the Influence of Vortex Generator Arrangement on Heat Transfer Enhancement of Oil-Cooled Motor

Energies, 2021
At present, vortex generators have been extensively used in radiators to improve the overall heat transfer performance. However, there is no research on the effect of vortex generators on the ends of motor coils.
Junjie Zhao, Bin Zhang, Xiaoli Fu, Shenglin Yan   +3 more
doaj   +1 more source

Manipulation of Energy Flow with X-Type Vortex

Photonics, 2022
In this study, a new method for manipulating energy flow in a 3D vector field is proposed. In this method, an azimuthally-polarized beam with a noncanonical vortex, the X-type vortex, is focused in a high-numerical aperture system.
Han Zhang, Tianhu Zhang, Xinying Zhao, Xiaoyan Pang   +3 more
doaj   +1 more source

Generation of fluid force oscillation due to wind direction in a longitudinal vortex driven horizontal axis circular cylinder blade wind turbine

Nihon Kikai Gakkai ronbunshu, 2022
A prediction model of the fluid force on a cylindrical blade driven by the Necklace vortex is developed and verified by experiments when the yaw angle is given.
Shota NAKADA, Ryota ISHIKAWA, Yasunori SATO, Tsutomu TAKAHASHI   +3 more
doaj   +1 more source

A Three-Dimensional Body Force Modeling of Fans in Windmilling Condition and Its Application

Aerospace, 2023
To investigate the aerodynamic characteristics of the fan in windmilling conditions, a new body force model with the fan rotational speed prediction model was developed.
Qingguo Kong, Wei Jia
doaj   +1 more source

Development of circular cylinder blade wind turbine driven by longitudinal vortex

Nihon Kikai Gakkai ronbunshu, 2021
It is known that the longitudinal vortex alternately and periodically forms diagonally backward of the upstream cylinder of the cruciform system consisted of the upstream cylinder and the downstream strip-plate and causes the strong periodic lift force ...
Kasumi SAKAMOTO, Keita UDAKA, Withun HEMSUWAN, Tsutomu TAKAHASHI   +3 more
doaj   +1 more source