Broadband sound generation by flow through a dynamic physical model of the larynx

2001 ◽  
Vol 109 (5) ◽  
pp. 2416-2416
Author(s):  
Zhaoyan Zhang ◽  
Luc Mongeau ◽  
Steven Frankel
Keyword(s):  
Physical Model ◽  
Sound Generation ◽  
Flow Through ◽  
Broadband Sound

scholarly journals Topographic influence on the pattern of flow through Bass Strait

1995 ◽  
Vol 46 (4) ◽  
pp. 763 ◽  
Author(s):  
PG Baines ◽  
DL Murray
Keyword(s):  
Flow Pattern ◽  
Physical Model ◽  
Potential Vorticity ◽  
Laboratory Simulation ◽  
Eastern Region ◽  
Constant Depth ◽  
The West ◽  
Flow Through ◽  
Southern Branch ◽  
Topographic Influence

A laboratory simulation of the flow through Bass Strait has been made with the aid of a physical model of the topography, situated in a tank on a rotating turntable. The throughflow was driven by a continuous supply of homogeneous water to the western end that was uniform with latitude. The effect of the depth variations within the strait were realistically represented and had a controlling influence on the flow pattern. In particular, the uniform inflow from the west was directed towards the south-eastern region, guided along contours of constant depth around the central depression by approximate conservation of potential vorticity. West of Flinders Island, the flow then splits into a northward branch that flows toward the Victorian coast and leaves the strait near Gabo Island and a southern branch that leaves through Banks Strait. This modelled flow pattern is generally consistent with the outflows inferred from observed temperature and salinity fields.

A physical model for mixed phase flow through beds of porous particles

AIChE Journal ◽  
1963 ◽  
Vol 9 (1) ◽  
pp. 103-106 ◽  
Author(s):  
M. B. Glaser ◽  
Mitchell Litt
Keyword(s):  
Physical Model ◽  
Mixed Phase ◽  
Phase Flow ◽  
Porous Particles ◽  
Flow Through

Sound generation by steady flow through glottis-shaped orifices

2004 ◽  
Vol 116 (3) ◽  
pp. 1720-1728 ◽  
Author(s):  
Zhaoyan Zhang ◽  
Luc Mongeau ◽  
Steven H. Frankel ◽  
Scott Thomson ◽  
Jong Beom Park
Keyword(s):  
Steady Flow ◽  
Sound Generation ◽  
Flow Through

scholarly journals Stepped spillways with aerators: hydrodynamic pressures and air entrainment

RBRH ◽  
2021 ◽  
Vol 26 ◽  
Author(s):  
Rute Ferla ◽  
Carolina Kuhn Novakoski ◽  
Priscila dos Santos Priebe ◽  
Mauricio Dai Prá ◽  
Marcelo Giulian Marques ◽  
...  
Keyword(s):  
Experimental Study ◽  
Physical Model ◽  
Air Entrainment ◽  
Specific Flow ◽  
Flow Rates ◽  
Stepped Spillways ◽  
Entrainment Coefficient ◽  
Flow Through ◽  
New Equation ◽  
Stepped Chute

ABSTRACT The possibility of damage due to the phenomenon of cavitation leads the design of stepped spillways considering maximum specific discharges of 15 to 30 m2/s, a limit considerably lower than that practiced on smooth chutes. Aerators promote the insertion of air in the flow, allowing for the increase of specific flow rates. This work analyzes the pressures on the vertical faces of the steps and the air entrainment coefficient in the flow, through an experimental study in a physical model with a stepped chute angle of 53.13o, considering the installation of aerators in different places of the channel. Comparing the tested conditions with the natural aeration, it is concluded that the installation of the aerator does not change the magnitude of the minimum extreme hydrodynamic pressures, but anticipates the beginning of the flow aeration. A new equation is proposed to estimate the air entrainment coefficient, as well as a methodology for forecasting extreme pressures on the vertical faces of the steps, both valid in the range 3.0 ≤ Fr ≤ 6.0.

Broadband sound generation by confined turbulent jets

2002 ◽  
Vol 112 (2) ◽  
pp. 677-689 ◽  
Author(s):  
Zhaoyan Zhang ◽  
Luc Mongeau ◽  
Steven H. Frankel
Keyword(s):  
Turbulent Jets ◽  
Sound Generation ◽  
Broadband Sound

Development of apical pits in chloride cells of the gills of Pimephales promelas after chronic exposure to acid water

1983 ◽  
Vol 41 ◽  
pp. 462-463
Author(s):  
Richard L. Leino ◽  
Jon G. Anderson ◽  
J. Howard McCormick
Keyword(s):  
Confidence Interval ◽  
Chronic Exposure ◽  
Lake Superior ◽  
Pimephales Promelas ◽  
Chloride Cells ◽  
Fathead Minnows ◽  
Secondary Lamellae ◽  
Untreated Water ◽  
Water Ph ◽  
Flow Through

Groups of 12 fathead minnows were exposed for 129 days to Lake Superior water acidified (pH 5.0, 5.5, 6.0 or 6.5) with reagent grade H2SO4 by means of a multichannel toxicant system for flow-through bioassays. Untreated water (pH 7.5) had the following properties: hardness 45.3 ± 0.3 (95% confidence interval) mg/1 as CaCO3; alkalinity 42.6 ± 0.2 mg/1; Cl- 0.03 meq/1; Na+ 0.05 meq/1; K+ 0.01 meq/1; Ca2+ 0.68 meq/1; Mg2+ 0.26 meq/1; dissolved O2 5.8 ± 0.3 mg/1; free CO2 3.2 ± 0.4 mg/1; T= 24.3 ± 0.1°C. The 1st, 2nd and 3rd gills were subsequently processed for LM (methacrylate), TEM and SEM respectively.Three changes involving chloride cells were correlated with increasing acidity: 1) the appearance of apical pits (figs. 2,5 as compared to figs. 1, 3,4) in chloride cells (about 22% of the chloride cells had pits at pH 5.0); 2) increases in their numbers and 3) increases in the % of these cells in the epithelium of the secondary lamellae.

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