Experimental and Numerical Studies of Water Droplet Impact on a Porous Surface in the Film-Boiling Regime

2008 ◽  
Vol 47 (23) ◽  
pp. 9174-9182 ◽  
Author(s):  
Zhao Yu ◽  
Fei Wang ◽  
L.-S. Fan
Keyword(s):  
Water Droplet ◽  
Droplet Impact ◽  
Porous Surface ◽  
Film Boiling ◽  
Boiling Regime ◽  
Numerical Studies

scholarly journals Receding height of water droplet in the film boiling regime

2019 ◽  
Vol 670 ◽  
pp. 012038
Author(s):  
S Illias ◽  
S Hussain ◽  
N A Rosman ◽  
N S Abdullah ◽  
A I M Shaiful ◽  
...  
Keyword(s):  
Water Droplet ◽  
Film Boiling ◽  
Boiling Regime

AN APPROXIMATE MODEL OF INCIPIENCE OF HIGHLY INTENSIVE FILM BOILING REGIME IN SUBCOOLED LIQUIDS

2018 ◽  
Author(s):  
Victor V. Yagov ◽  
Arslan R. Zabirov ◽  
Pavel K. Kanin ◽  
Maxim A. Lexin
Keyword(s):  
Approximate Model ◽  
Film Boiling ◽  
Boiling Regime

A Photographic Study on the Effects of Hydrophobic-Spot Size and Subcooling on Local Film Boiling

2013 ◽  
Author(s):  
Bambang Joko Suroto ◽  
Masahiro Tashiro ◽  
Sana Hirabayashi ◽  
Sumitomo Hidaka ◽  
Masamichi Kohno ◽  
...  
Keyword(s):  
Heat Flux ◽  
High Speed ◽  
Bubble Dynamics ◽  
Pure Water ◽  
Nucleate Boiling ◽  
Spot Size ◽  
Copper Surface ◽  
Film Boiling ◽  
Working Fluid ◽  
Boiling Regime

The effects of hydrophobic circle spot size and subcooling on local film boiling phenomenon from the copper surface with single PTFE (Polytetrafluoroethylene) hydrophobic circle spot at low heat flux has been investigated. The experiments were performed using pure water as the working fluid and subcooling ranging from 0 and 10K. The heat transfer surfaces are used polished copper block with single PTFE hydrophobic circle spot of diameters 2, 4 and 6 mm, respectively. A high-speed camera was used to capture bubble dynamics and disclosed the sequence of the process leading to local film boiling. The result shows that local films boiling occurs on the PTFE circle spot at low heat flux and was triggered by the merging of neighboring bubbles. The study also showed that transition time required for change from nucleate boiling regime to local film boiling regime depends on the diameter of the hydrophobic circle spot and the subcooling. A stable local film boiling occurs at the smallest diameter of hydrophobic spot. Subcooling cause the local film boiling occur at negative superheat and oscillation of bubble dome.

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