Sustaining nucleate boiling in zero gravity using asymmetric sinusoidal base-plate oscillation

2021 ◽  
pp. 122262
Author(s):  
Harshal S. Raut ◽  
Amitabh Bhattacharya ◽  
Atul Sharma
Keyword(s):  
Base Plate ◽  
Nucleate Boiling ◽  
Zero Gravity

An Experimental Study of Boiling in Reduced and Zero Gravity Fields

1961 ◽  
Vol 83 (3) ◽  
pp. 243-251 ◽  
Author(s):  
C. M. Usiskin ◽  
R. Siegel
Keyword(s):  
Heated Surface ◽  
Motion Pictures ◽  
Nucleate Boiling ◽  
Film Boiling ◽  
Zero Gravity ◽  
Vapor Bubbles ◽  
Low Gravity ◽  
Effective Gravity ◽  
Gravity Fields ◽  
The One

A pool boiling apparatus was mounted on a counterweighted platform which could be dropped a distance of nine feet. By varying the size of the counterweight, the effective gravity field on the equipment was adjusted between zero and unity. A study of boiling burnout in water indicated that a variation in the critical heat flux according to the one quarter power of gravity was reasonable. A consideration of the transient burnout process was necessary in order to properly interpret the data. A photographic study of nucleate boiling showed how the velocity of freely rising vapor bubbles decreased as gravity was reduced. The bubble diameters at the time of breakoff from the heated surface were found to vary inversely as gravity to the 1/3.5 power. Motion pictures were taken to illustrate both nucleate and film boiling in the low gravity range.

A Photographic Study of Boiling in the Absence of Gravity

1959 ◽  
Vol 81 (3) ◽  
pp. 230-236 ◽  
Author(s):  
R. Siegel ◽  
C. Usiskin
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Boiling Heat Transfer ◽  
High Speed ◽  
Free Fall ◽  
Nucleate Boiling ◽  
Zero Gravity ◽  
Experimental Equipment ◽  
Boiling Process ◽  
Qualitative Effect

A photographic study was made to determine the qualitative effect of zero gravity on the mechanism of boiling heat transfer. The experimental equipment included a container for boiling water and a high-speed motion-picture camera. To eliminate the influence of gravity, these were mounted on a platform which was allowed to fall freely approximately 8 ft. During the free fall, photographs were taken of boiling from various surface configurations such as electrically heated horizontal and vertical ribbons. The heat flux was varied to produce conditions from moderate nucleate boiling to burnout. The results indicate that gravity plays a considerable role in the boiling process, especially in connection with the motion of vapor within the liquid.

scholarly journals Boiling Heat Transfer With Cryogenic Fluids at Standard, Fractional, and Near-Zero Gravity

1964 ◽  
Vol 86 (3) ◽  
pp. 351-358 ◽  
Author(s):  
H. Merte ◽  
J. A. Clark
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Nucleate Boiling ◽  
Film Boiling ◽  
Test Time ◽  
Zero Gravity ◽  
Saturated Liquid ◽  
Cryogenic Fluids ◽  
Short Test ◽  
Minimum Heat

A study is reported of boiling heat transfer with saturated liquid nitrogen under atmospheric pressure at standard, fractional, and near-zero gravity. A drop-tower technique is used to achieve the reduced gravities. Because of the short test time available a transient technique using a sphere as a transient calorimeter is employed to obtain the heat-transfer data. This technique permits the ready acquisition of data in all boiling regimes from the film boiling region through nucleate boiling. Comparison is made with correlations for film boiling and for maximum and minimum heat flux and their corresponding Δtsat.

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