scholarly journals Local Heat Transfer and CHF for Subcooled Flow Boiling - Annual Report 1996

2000 ◽  
Author(s):  
Dr. Ronald D. Boyd
Keyword(s):  
Heat Transfer ◽  
Annual Report ◽  
Flow Boiling ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Subcooled Flow Boiling ◽  
Subcooled Flow

Local Heat Transfer for Subcooled Flow Boiling with Water

1992 ◽  
Vol 22 (4) ◽  
pp. 501-510 ◽  
Author(s):  
Ronald D. Boyd ◽  
Xiaowei Meng
Keyword(s):  
Heat Transfer ◽  
Flow Boiling ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Subcooled Flow Boiling ◽  
Subcooled Flow

scholarly journals Experimental Study on Local Subcooled Flow Boiling Heat Transfer in a Vertical Mini-Gap Channel

2016 ◽  
Author(s):  
Jun-ye Li ◽  
Zhao-zan Feng ◽  
Carolyn Coyle ◽  
Thomas J. McKrell ◽  
Jacopo Buongiorno ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Coefficient ◽  
Test Section ◽  
Flow Boiling ◽  
Bubbly Flow ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Subcooled Flow Boiling ◽  
Subcooled Flow

An experimental study of subcooled flow boiling in a high-aspect-ratio, one-sided heating rectangular mini-gap channel was conducted using deionized water. The local heat transfer coefficient, onset of nucleate boiling, and flow pattern of subcooled boiling were investigated. The influence of heat flux and mass flux were studied with the aid of a high-speed camera. The results show that the flow pattern was mainly isolated bubbly flow when the narrow microchannel was placed vertically. The bubbles generated at lower mass fluxes were larger and did not easily depart, forming elongated bubbly flow and flowing upstream. The thin film evaporation mechanism dominated the entire test section due to the elongated bubbles and transient local dryout as well as rewet. The local heat transfer coefficient near the exit of the test section was larger.

An Experimental Investigation on Flow Boiling of Ethylene-Glycol/Water Mixtures

2003 ◽  
Vol 125 (2) ◽  
pp. 317-325 ◽  
Author(s):  
Satish G. Kandlikar ◽  
Murat Bulut
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Binary Mixtures ◽  
Flow Boiling ◽  
Rectangular Channel ◽  
Saturation Temperature ◽  
Local Heat Transfer ◽  
Transfer Coefficients ◽  
Subcooled Flow Boiling ◽  
Subcooled Flow

Mixtures of ethylene glycol and water are used in cooling the engines in automotive applications. Heat is transferred essentially under subcooled flow boiling conditions as the mixture flows over the hot surfaces, which are at temperatures well above the local saturation temperature of the mixture. Very little information is available in the literature on the subcooled flow boiling characteristics of this mixture. The present work focuses on obtaining experimental heat transfer data for water and its mixtures containing ethylene-glycol (0 to 40 percent mass fraction, limited by the maximum allowable temperature in the present setup) in the subcooled flow boiling region. The experimental setup is designed to obtain local heat transfer coefficients over a small circular aluminum heater surface, 9.5-mm in diameter, placed at the bottom 40-mm wide wall of a rectangular channel 3-mm×40-mm in cross-section. Available models for (a) subcooled flow boiling of pure liquids and (b) saturated flow boiling of binary mixtures are extended to model the subcooled flow boiling of binary mixtures.

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