Results 21 to 30 of about 178 (112)

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

open access: yesNihon 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   +3 more
doaj   +1 more source

Ring Dark Solitons and Vortex Necklaces in Bose-Einstein Condensates [PDF]

open access: yesPhysical Review Letters, 2003
Phys. Rev.
Theocharis, G   +4 more
openaire   +5 more sources

Development of circular cylinder blade wind turbine driven by longitudinal vortex

open access: yesNihon 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   +3 more
doaj   +1 more source

Effect of blade tip on torque characteristics of circular cylinder blade wind turbine driven by longitudinal vortex

open access: yesNihon 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   +2 more
doaj   +1 more source

Spin-2 Bose–Einstein condensates in an annular trap with spin–orbit coupling

open access: yesResults in Physics, 2020
We study the ground-state phases of spin–orbit coupled spin-2 Bose–Einstein condensates in a two-dimensional concentrically coupled annular trap with the attractive and repulsive spin-exchange interactions, respectively.
Yue-Qing Li, Yun-Xia Sui, Ji-Guo Wang
doaj   +1 more source

Making ghost vortices visible in two-component Bose-Einstein condensates

open access: yesPhysical Review Research, 2023
Ghost vortices constitute an elusive class of topological excitations in quantum fluids since the relevant phase singularities fall within regions where the superfluid density is almost zero.
Andrii Chaika   +2 more
doaj   +1 more source

Observation of Self-Patterned Defect Formation in Atomic Superfluids–from Ring Dark Solitons to Vortex Dipole Necklaces

open access: yesPhysical Review X, 2023
Unveiling nonequilibrium dynamics of solitonic and topological defect structures in a multidimensional nonlinear medium is a current frontier across diverse fields. One of the quintessential objects is a ring dark soliton (RDS), whose dynamics are expected to display remarkable interplay between symmetry and self-patterned topological defect formation ...
Hikaru Tamura   +2 more
openaire   +4 more sources

Influence of Cross-Sectional Configuration on the Longitudinal Vortex Excitation of the Upstream Cylinder in Cruciform Two-Cylinder System

open access: yesJournal of Fluid Science and Technology, 2006
In earlier works by the present authors, it was shown that a large cross-flow excitation is induced to a circular cylinder by setting another cylinder downstream in a cruciform arrangement with a certain gap between them, caused by longitudinal vortices ...
Naoto KATO   +3 more
doaj   +1 more source

Universality of Longitudinal Vortices Shedding from a Cruciform Two Circular Cylinder System in Uniform Flow

open access: yesJournal of Fluid Science and Technology, 2010
Earlier wind tunnel experiments supported by visualization in water flow carried out by the present authors showed that two types of longitudinal vortices shed periodically from a cruciform two identical circular cylinder system in uniform flow.
Tuananh NGUYEN   +3 more
doaj   +1 more source

Numerical simulation of thermal striping phenomena in a T-junction piping system for fundamental validation and uncertainty quantification by GCI estimation

open access: yesMechanical Engineering Journal, 2015
Thermal striping caused by the mixing of fluids at different temperatures is one of the most important issues in the design of Sodium cooled Fast Reactors (SFRs), because it may cause high-cycle thermal fatigue in the structure and affect the structural ...
Masaaki TANAKA, Yasuhiro MIYAKE
doaj   +1 more source

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