Rheometers have been used extensively for evaluating dynamic viscoelasticity of viscoelastic fluids by measuring the stress response to the sinusoidal strain applied to the fluids. It was reported that dynamic viscoelasticity was also derived base...
Visualization and PIV measurements were conducted in a towing air-chamber for wake vortices behind a paraboloidal-nose cylinder at high angles of attack. The evolution of the wake was then measured by a particle image velocimetry (PIV) using cross...
Fumihiko Mikami   Ryohei Toyota   Nobuhide Nishikawa   
THIRD INTERNATIONAL SYMPOSIUM ON BIFURCATIONS AND INSTABILITIES IN FLUID DYNAMICS 216(1) 012013 (7pp) 2010年 [査読有り]
Flow visualization was used to investigate experimentally the evolution process of the instability in the separated shear layer behind an axisymmetric paraboloidal-nose cylinder at high angles of attack. The appearance of instability is observed a...
The flow around a sphere falling through viscoelastic wormlike micelle solutions is investigated by using a particle image velocimetry (PIV) when the falling velocity of the sphere is high compared to the shear wave speed of the fluid. The speed o...
年次大会 : Mechanical Engineering Congress, Japan 2015 "S0520203-1"-"S0520203-5" 2015年9月
PIV measurements were conducted for the development of the withdrawal current of viscoelastic fluid induced by a line sink between parallel walls. The experiments were performed in a rectangular reservoir 700 mm long, 50 mm wide, and filled with a...
Particle image velocimetry (PFV) based on an optical flow equation requires numerical evaluation of temporal differential terms between two particle images, which has an unmanageable source of noises. In this research, by using a generally availab...
In this study, we focus on substance transportation of counter-rotating vortex-pair in the uniform flow, and its interaction with a flat plate is visualized. A water tunnel and aluminum wings (NACA0012) are used to generate a wing-tip vortex pair....