I Department of Radiology. Bowman Gray School of Medicine, Wake Forest University. Winston-Salem, NC 27103. Address reprint requests to D. J. Ott. 2 Department of Medicine, Bowman Gray School of Medicine, Wake Forest University. WinstonSalem, NC 27103. AJR 142:281-287, February 1984 0361 -803X/84/1 422-0281 © American Roentgen Ray Society Considerable controversy and confusion over the anatomy ...

Abstract The motion of cosmic strings in the universe leads to generation wakes behind them. We study magnetized moving postrecombination plasma. show that magnetic reconnection can occur postshock region. Since width cosmic-string wake is very small, occurs over a short length scale. large amount kinetic energy being released region wake. This enhances during reconnection. make rudimentary est...

Near-wake characteristics of a turbine play an important role in turbine–wake interactions and performance assessment arrays. In this study, the near-wake flow behind laboratory-scale tidal stream is simulated compared with experimental data. An actuator-line model used to represent rotating blades. Further, two physics-based turbulence corrections are proposed for unsteady Reynolds-averaged Na...

Experiments with circular cylinders in high-speed flow reveal new universal behavior associated coherent oscillations the near-wake region. The Strouhal number shows invariance respect to both Reynolds and Mach number. Further, disturbances top bottom halves of wake have an anti-symmetric relationship.

and suppressing fluctuating amplitude of the dynamic wind loads acting on the test model. With 24 suction/jet holes evenly distributed over the cylindrical test model (i.e., the N13 design of the present study), the passive jet control method was found to be able to achieve up to 33.7 % in drag reduction and 90.6 % in fluctuating wind loading suppression, in comparison with the baseline case. T...

The effect of base suction on a plane wake was found to produce significant changes on wake dynamics. The wake is produced by merging two boundary layers from the trailing edge of a splitter plate in a two stream water tunnel. A threshold suction speed exists which is equal to half of the free stream velocity. If the suction speed is below the threshold, the wake flow is unstable. If the suctio...

Flow around square cylinders with cut-corners at the front edges is investigated using particle image velocimetry. It is found that drag reduction can be achieved for the tested cut-corner dimensions. The mechanism for the drag reduction is explored on the statistical and structural aspects of the flow. After cutting the corners, the fluctuation intensity of the wake is weakened, the length of ...

Streamwise and spanwise flow pattern over three rounded contour bumps with different flow control strategies employed have been experimentally investigated in a Mach 1.3 freestream. Surface oil flow visualisation, Schlieren photography and particle image velocimetry measurements were used for flow diagnostics. Experimental data showed that in a Mach 1.3 freestream over the baseline plain bump, ...

The prevalence of noise in the riding of motorcycles has been a source of concern to both riders and researchers in recent times. Detailed flow field information will allow insight into the flow mechanisms responsible for the production of sound within motorcycle helmets. Flow field surveys of this nature are not found in the available literature which has tended to focus on sound pressure leve...