On the early onset of transition in circular-orifice baffled tubes: an experimental study

2018 ◽  
Author(s):  
Jose Munoz ◽  
D. Crespí ◽  
J. P. Solano ◽  
P. G. Vicente
Keyword(s):  
Experimental Study ◽  
Early Onset ◽  
Circular Orifice

Forced and Periodic Vortex Breakdown

1967 ◽  
Vol 89 (3) ◽  
pp. 609-615
Author(s):  
Turgut Sarpkaya
Keyword(s):  
Experimental Study ◽  
Opposite Direction ◽  
Vortex Tube ◽  
Vortex Breakdown ◽  
Swirling Flow ◽  
Typical Data ◽  
Circular Orifice ◽  
Pros And Cons

The results of an experimental study of the forced and periodic breakdown of a confined vortex rotating in the opposite direction are presented. The vortex tube consists of two chambers connected by a short conduit through streamlined transitions. The upstream end is closed by a plain wall, and a circular orifice is provided at the downstream end. The swirling flow and the breaker-vortex are generated by introducing varying proportions of air or water through tangential ports located near the upstream and downstream walls of the unit. The cases of single breakdown and periodic breakdown are explored and typical data are presented for each case. Finally, the pros and cons of the two existing transition theories are discussed.

The Effect of Visual Deprivation on the Organization of Conceptual Knowledge

2010 ◽  
Vol 57 (2) ◽  
pp. 83-88 ◽  
Author(s):  
J. Frederico Marques
Keyword(s):  
Experimental Study ◽  
Proactive Interference ◽  
Early Onset ◽  
Conceptual Knowledge ◽  
Visual Deprivation ◽  
Visual Cue ◽  
Retrieval Cues ◽  
Release From Proactive Interference

The present paper evaluates the effect of visual deprivation on the organization and retrieval of conceptual knowledge. The experimental study used the release from proactive interference (PI-release) paradigm. Early onset blind (EOB) and sighted (S) subjects were tested with this task and additional visual and nonvisual property retrieval cues. PI-release results showed that the visual cue was less effective for EOB individuals than for S individuals, whereas the nonvisual cue was similarly effective for EOB individuals and S individuals. Results support a grounded view of cognition where the organization of conceptual knowledge depends on the role that sensory and motor channels play in its acquisition.

scholarly journals E2 collectivity in shell-model calculations for odd-mass nuclei near 132Sn

2020 ◽  
Vol 232 ◽  
pp. 04007
Author(s):  
T. J. Gray ◽  
A. E. Stuchbery ◽  
L. A. Fuderer ◽  
J. M. Allmond
Keyword(s):  
Experimental Study ◽  
Shell Model ◽  
Early Onset ◽  
Coupling Scheme ◽  
Model Calculations ◽  
Show Evidence

Shell-model calculations for 127,129In and 129,131Sb are presented, and interpreted in the context of the particle-core coupling scheme, wherein proton g9/2 holes or g7/2 particles are added to semimagic 128,130Sn cores. These results indicate that the particle-core coupling scheme is appropriate for the Sb isotopes, whilst less so for the In isotopes. B(E2) excitation strengths are also calculated, and show evidence of enhanced collectivity in both Sb isotopes, especially 131Sb. This observation suggests that 131Sb would be an excellent case for an experimental study seeking to investigate the early onset of collectivity near 132Sn.

Experimental Study of Turbulence Across the Fractal Orifice Plate

2010 ◽  
Author(s):  
S. M. Muztaba Salim ◽  
Franck C. G. A. Nicolleau ◽  
Stephen B. M. Beck ◽  
Andrzej F. Nowakowski
Keyword(s):  
Experimental Study ◽  
Pressure Drop ◽  
Wind Tunnel ◽  
Orifice Plate ◽  
Flow Structures ◽  
Flow Properties ◽  
Flow Area ◽  
Flow Mixing ◽  
Circular Orifice ◽  
Edge Sharpness

An experimental study of turbulence behind a fractal orifice plate, a variant of classical circular orifice plate, was conducted in a circular wind tunnel. Four fractal orifice plates with iteration levels from zero to three in combination with a classical circular orifice plate, each with equal flow area, were used in the study. Of the two main objectives, the first one was to test the superiority of the proposed fractal orifice plate against the classical one and the second one was to investigate the fractal orifice effect on the flow properties. Across the fractal orifice plate, a decrease in the pressure drop and an increase in the flow mixing is observed making it much more efficient than the classical orifice plate. It was suggested that at each fractal iteration, the added edge sharpness generated finer flow structures and these flow structures were eventually responsible for the improved efficiency.

Innovation in Growing Rod Technique for Early Onset Scoliosis: An Experimental Study Based on a Porcine Scoliosis Model

2015 ◽  
Vol 15 (10) ◽  
pp. S174-S175
Author(s):  
Weijun Wang ◽  
Xin Zheng ◽  
Yong Qiu ◽  
Bangping Qian ◽  
Xu Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Early Onset ◽  
Early Onset Scoliosis ◽  
Growing Rod ◽  
Growing Rod Technique

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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