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Hydrodynamic Performance of Gas Microbearings
Journal of Tribology, 2004Hydrodynamic performance of gas microbearings, fabricated with deep X-ray lithography and electroplating, will be presented in this article. Static performance in terms of load parameters and attitude angles was calculated using Molecular Gas Lubrication (MGL) theory.
Daejong Kim +3 more
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Hydrodynamic performance of additively manufactured minichannels
2021 20th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm), 2021Additive manufacturing can be used to fabricate components with complex flow channels for a variety of applications. Examples includes minichannels through with fluids flows for heat transfer applications. However, an efficient design of such systems requires a deep understanding of the thermal and hydrodynamic performance on channel surfaces.
Suliman Alfaiz +5 more
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Numerical Simulation of the Hydrodynamic Ship Performance
2018The study provides a numerical investigation of the ship hull performance for the Japan Bulk Carrier (JBC hereafter). The study includes computations for the ship resistance, trim and sinkage, free-surface elevation and wake flow for both, the bare hull and for the ship equipped with an energy saving device.
Adham S. Bekhit, Adrian Lungu
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Hydrodynamic Performance of Pipe Underdrains
Journal of the Irrigation and Drainage Division, 1978Theoretical analysis and laboratory investigations of flexible-flap drain valve in high-velocity open channel flow are presented. Main hydrodynamic characteristics of the valve are: (1)Radial diffuser action, which prevents the valve from opening at low pressures; and (2)uplift forces, caused by high-velocity flow in the channel, helping the valve to ...
J. Mevorach, K. Zanker
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Hydrodynamic Performance of Porpoises ( Stenella attenuata )
Science, 1966Two specimens of Stenella attenuata , trained to chase a winch-towed lure, reached a top speed of 11.03 meters per second (21.4 knots) in 2.0 seconds. The maximum power output, occurring 1.5 seconds after the start, was calculated from measured values of acceleration and drag coefficient.
T G, Lang, K, Pryor
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Study on hydrodynamic performance and CFD simulation of AUV
2017 IEEE International Conference on Information and Automation (ICIA), 2017For an unmanned marine vehicles, the calculations of its resistance under the water and hydrodynamic coefficients are necessary and important work. For the complexity of the fluid around autonomous underwater vehicles(AUV), the kinematic and dynamic model of underwater vehicles are highly nonlinear and coupled so that the hydrodynamic performance are ...
Haibin Zheng, Xin Wang, Zebin Xu
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Prediction on Hydrodynamic Performances of Propeller by OpenFOAM
Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV, 2009In this paper the flow around a propeller is simulated by open source CFD tool-OpenFOAM. In order to validate the availability of OpenFOAM code in the field of propeller theory, the steady hydrodynamic performances of DTMB P4119 propeller is predicted. The discrete schemes are second order upwind. The grids are generated by GAMBIT software.
Wei Li +4 more
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The Hydrodynamical Performance of Migratory Salmon
Journal of Experimental Biology, 1961ABSTRACT The annual spawning migration of Pacific Coast salmon up the Columbia and Amur rivers has been analysed as an experiment on the maximum range of an un-refuelled vehicle, since the fish do not eat during this migration. The fuel (primarily fat) available to real fish is compared to that computed for an equivalent rigid vehicle ...
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Performance and Applications of Hydrodynamic Oscillators
The Journal of the Acoustical Society of America, 1956A class of hydrodynamic oscillators is being developed which shows considerable promise for sonic and ultrasonic applications involving large acoustic power requirements. These devices convert liquid flow energy into acoustic energy with conversion efficiencies that can exceed 50% in favorable circumstances.
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The “Problematic” Hydrodynamic Performance of Gero's Great Barracuda
Nature, 1966BAINBRIDGE1 rightly questioned Gero's2 data and calculations on the swimming performance of a great barracuda (Sphyraena barracuda (Walbaum)) measured at Bimini, Bahamas, British West Indies, but suspicion was cast on the wrong datum. He doubted the validity of the swimming speed measurement of 12.16 m/sec or 10 body-lengths/sec for a 121.6 cm fish ...
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