TWO-DIMENSIONAL BINGHAM PLASTIC FLOW IN A CYLINDRICAL PRESSURISED CLUTCH

An examination of the capability of an energised electro-rheological fluid to act as a rotating shaft seal is reported. A two-dimensional laminar flow model based on a Bingham plastic flowing between parallel plate electrodes indicated that leakage would always occur whenever the shaft was in rotation, whatever the magnitude of the pressure gradient along the sealing annulus. This result was confirmed in experiments, the results of which show some discrepancy between theory and experiment in the magnitude of the leakage rate. However this error is accountable and is acceptable in the area of immediate interest-shaft speed of circa 1000/1500 rpm and at maximum yield or electro-stress.

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Numerical Analysis of the Flow Field Within Lip Seals Containing Microundulations

Journal of Tribology ◽

10.1115/1.2920909 ◽

1992 ◽

Vol 114 (3) ◽

pp. 485-491 ◽

Cited By ~ 33

Author(s):

R. F. Salant

Keyword(s):

Numerical Analysis ◽

Flow Field ◽

Shear Deformation ◽

Leakage Rate ◽

Shaft Speed ◽

Rotating Shaft ◽

Lip Seal ◽

Lubricating Film ◽

Lip Seals

The flow field within the lubricating film of a rotating shaft lip seal containing microundulations is analyzed numerically. The results demonstrate that the action of the microundulations can prevent leakage through the seal. The effects on leakage rate of shaft speed, undulation amplitude and wavelength, shear deformation of the undulations, flattening of the undulations, and axial lip profile are presented.

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A Two-Dimensional Laminar Flow Model for Thermodenuders Applied to Vapor Pressure Measurements

Aerosol Science and Technology ◽

10.1080/02786826.2012.750711 ◽

2012 ◽

Vol 47 (3) ◽

pp. 283-293 ◽

Cited By ~ 3

Author(s):

Sung Hoon Park ◽

Steven N. Rogak ◽

Andrew P. Grieshop

Keyword(s):

Laminar Flow ◽

Vapor Pressure ◽

Flow Model ◽

Pressure Measurements ◽

Two Dimensional ◽

Vapor Pressure Measurements ◽

Laminar Flow Model

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Thermal Analysis of Stratified Storage Tanks

Journal of Solar Energy Engineering ◽

10.1115/1.3268287 ◽

1989 ◽

Vol 111 (1) ◽

pp. 54-61 ◽

Cited By ~ 29

Author(s):

Ruey-Jong Shyu ◽

Jian-Yuan Lin ◽

Liang-Jyi Fang

Keyword(s):

Flow Model ◽

Experimental Studies ◽

Thick Wall ◽

Two Dimensional ◽

Tank Wall ◽

Storage Tanks ◽

Axial Conduction ◽

Insulation Thickness ◽

Temperature And Flow Fields ◽

Laminar Flow Model

This paper presents theoretical and experimental studies on the stratification decay in stratified storage tanks. The effects of the thicknesses of tank wall and thermal insulation were discussed. The experimental results showed that the outside insulation can enhance tank wall axial conduction which tends to degrade the stratification. However, the reduction of heat loss outweighs the enhancement of axial conduction and better stratification is still maintained when compared to a bare wall tank. The axial conduction enhancement is sensitive to the wall thickness for the same thickness of insulation, however, it is not strongly dependent on the insulation thickness for identical thick wall. The addition of inside insulation is helpful in preserving stratification. A two-dimensional laminar flow model was also developed to interpret the temperature and flow fields inside storage tanks and the numerical results were compared with the experimental data.

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Effects of Heat Intensity, Size, and Position of the Components on Temperature Distribution Within an Electronic PCB Enclosure

Journal of Electronic Packaging ◽

10.1115/1.2904374 ◽

1990 ◽

Vol 112 (3) ◽

pp. 249-254 ◽

Cited By ~ 9

Author(s):

Z.-G. Du ◽

E. Bilgen

Keyword(s):

Heat Transfer ◽

Natural Convection ◽

Temperature Distribution ◽

Laminar Flow ◽

Flow Model ◽

Convection Heat Transfer ◽

Natural Convection Heat Transfer ◽

Two Dimensional ◽

Convection Heat ◽

Laminar Flow Model

Natural convection heat transfer has been studied in a sealed small PCB enclosure of three heated components which are mounted on a PCB plate within a large console cooled by vented airflow. A two-dimensional laminar flow model is used with appropriate boundary conditions. Detailed influences of each parameter, such as intensity, size, and position of the heaters on temperature and flow distributions within the enclosure have been studied. The favorable component arrangements for various cases have been determined.

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