EXPERIMENTAL STUDY ON HORSE SHOE VORTEX AND COHERENT VORTEX AROUND VEGETATED GROYNE

2018 ◽  
Vol 74 (2) ◽  
pp. I_431-I_438
Author(s):  
Takaaki OKAMOTO ◽  
Takumi OKAZAKI ◽  
Masato TAKENAKA ◽  
Michio SANJOU ◽  
Keiichi TODA
Keyword(s):  
Experimental Study ◽  
Coherent Vortex ◽  
Horse Shoe Vortex

Torsion Galloping of Elongated Bluff Cross Sections

2002 ◽  
Author(s):  
Allan Larsen
Keyword(s):  
Experimental Study ◽  
Cross Sections ◽  
Body Surface ◽  
Vortex Structures ◽  
The Body ◽  
Fluid Stream ◽  
Sign Reversal ◽  
Moment Coefficient ◽  
Coherent Vortex ◽  
The Moment

Torsion galloping of slender structures in a fluid stream is often attributed to a sign reversal of the moment slope, i.e. the moment coefficient attains increasingly negative values with increasing positive angles of attack or visa versa. A numerical and experimental study has revealed that torsion galloping of certain bluff elongated cross sections can not be attributed solely to moment slope reversal but rather the formation and drift of large coherent vortex structures along the body surface.

scholarly journals GEOMETRIC CHARACTERISTICS OF WAVE-GENERATED SAND RIPPLES: A FULL-SCALE EXPERIMENTAL STUDY

2018 ◽  
pp. 48
Author(s):  
Dongxu Wang ◽  
Jing Yuan ◽  
Ole S. Madsen
Keyword(s):  
Experimental Study ◽  
Sediment Transport ◽  
Coastal Environment ◽  
Transport Processes ◽  
Flow Conditions ◽  
Sand Ripples ◽  
Geometric Characteristics ◽  
The Past ◽  
Coherent Vortex ◽  
Wave Induced

In the coastal environment, wave-induced sand ripples are usually observed under moderate near-bed flow conditions. Their occurrence significantly changes the local hydrodynamics and sediment transport processes. Over the past few decades, some solid progresses have been made towards understating the ripple dimensions under wave-generated near-bed flows, e.g., O'Donoghue et al. [2006], but very few studies are targeted on the more detailed geometric characteristics, e.g., the generic shape of ripples and the sharpness of ripple crests, which are closely related to the coherent vortex structures. This study is aimed at filling this knowledge gap.

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.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study

Experimental study of total body washout employing extracorporeal circulation and hypothermia

1974 ◽  
Vol 126 (2) ◽  
pp. 243-248
Author(s):  
A WAKABAYASHI ◽  
T KUBO ◽  
K CHARNEY ◽  
Y NAKAMURA ◽  
J CONNOLLY
Keyword(s):  
Experimental Study ◽  
Extracorporeal Circulation ◽  
Total Body

Gastric Freezing: An Experimental Study

1963 ◽  
Vol 45 (3) ◽  
pp. 374-383 ◽  
Author(s):  
Donald C. McIlrath ◽  
George A. Hallenbeck ◽  
Hubert A. Allen ◽  
Charles V. Mann ◽  
Edward J. Baldes ◽  
...  
Keyword(s):  
Experimental Study

The Effect of Cortisone and Corticotropin on The Healing of Gastric Ulcer: An Experimental Study

1958 ◽  
Vol 34 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Henry D. Janowitz ◽  
Vernon A. Weinstein ◽  
Rhoda G. Shaer ◽  
James F. Cereghini ◽  
Franklin Hollander
Keyword(s):  
Experimental Study ◽  
Gastric Ulcer
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