Experimental and theoretical study of vapor/air mixture condensation inside an inclined blind-end pipe in natural convection with considering fog formation

2022 ◽  
Vol 184 ◽  
pp. 122375
Author(s):  
Bing Tan ◽  
Jiejin Cai ◽  
Jiyun Zhao ◽  
Takashi Hibiki ◽  
W.X. Tian ◽  
...  
Keyword(s):  
Natural Convection ◽  
Theoretical Study

scholarly journals Theoretical study on melting of phase change material by natural convection

2021 ◽  
pp. 101620
Author(s):  
Bingkun Huang ◽  
Shimi Yang ◽  
Enyi Hu ◽  
Xiuxiu Li ◽  
Jun Wang ◽  
...  
Keyword(s):  
Natural Convection ◽  
Phase Change ◽  
Phase Change Material ◽  
Theoretical Study ◽  
Change Material

Optimization of Pulsating Heating in Pool Boiling

1997 ◽  
Vol 119 (2) ◽  
pp. 298-304 ◽  
Author(s):  
J. V. C. Vargas ◽  
A. Bejan
Keyword(s):  
Natural Convection ◽  
Single Phase ◽  
Theoretical Study ◽  
Thermal Conductance ◽  
Optimal Time ◽  
Time Interval ◽  
Heating Cycle ◽  
Excess Temperature ◽  
Time Intervals ◽  
Order Of Magnitude

This paper describes an experimental and theoretical study of the periodic on and off heating of water on a horizontal surface. The heat transfer is effected by natural convection and isolated bubbles. The experiments cover the heat flux range 33–154 kW/m2 and the wall excess temperature range 7–13°C. It is shown experimentally that the cycle-averaged thermal conductance between the surface and the pool can be maximized by properly selecting the time intervals of the on and off heating cycle. The maximum relative augmentation of the thermal conductance is approximately 15 percent. In the second part of the study, an order of magnitude analysis shows that the cycle-averaged thermal conductance can be maximized analytically by considering only the single-phase natural convection effect, and that the optimal time interval when heating is “on” agrees with the experimental results.

Convection Effects in Epitaxial Reactors: an Experimental and Theoretical Study

1988 ◽  
Vol 144 ◽  
Author(s):  
P. B. Chinoy ◽  
P. D. Agnello ◽  
S. K. Ghandhia
Keyword(s):  
Mathematical Model ◽  
Growth Rate ◽  
Energy Transfer ◽  
Natural Convection ◽  
Gas Flow ◽  
Theoretical Study ◽  
Excellent Correlation ◽  
Flow Rates ◽  
Wide Range ◽  
Experimental Vehicle

ABSTRACTAn experimental and theoretical study has been undertaken of the effects of natural and forced convection in horizontal epitaxial reactors. The epitaxial growth of GaAs was used as the experimental vehicle for this study. A mathematical model for mass, momentum and energy transfer in the reactor was developed. Excellent correlation between modeled and experimental results was demonstrated over a wide range of reactor pressures and susceptor geometries. Recirculation of hot gases, caused by natural convection, was found to result in a strong pressure dependence of growth rate at higher susceptor slopes. Low reactor pressures have been shown to be a more effective way to eliminate recirculation than high gas flow rates.

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