Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Study of Heating Surface Angle Effects on Single Bubble Growth

  • Kim, Jeong-Bae (New & Renewable Energy Research Department, KIER (Korea Institute of Energy Research)) ;
  • Kim, Hyung-Dae (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Lee, Jang-Ho (Department of Mechanical Engineering, Kunsan National University) ;
  • Kwon, Young-Chul (Division of Mechanical Engineering, Sunmoon University) ;
  • Kim, Jeong-Hoon (Department of Mechanical Engineering, Pusan National University) ;
  • Kim, Moo-Hwan (Department of Mechanical Engineering, Pohang University of Science and Technology)
  • Published : 2006.11.01
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Abstract

Nucleate pool boiling experiments were performed using pure R11 for various surface angles under constant heat flux conditions during saturated pool boiling. A 1-mm-diameter circular heater with an artificial cavity in the center that was fabricated using a MEMS technique and a high-speed controller were used to maintain the constant heat flux. Bubble growth images were taken at 5000 frames per second using a high-speed CCD camera. The bubble geometry was obtained from the captured bubble images. The effects of the surface angle on the bubble growth behavior were analyzed for the initial and thermal growth regions using dimensional scales. The parameters that affected the bubble growth behavior were the bubble radius, bubble growth rate, sliding velocity, bubble shape, and advancing and receding contact angles. These phenomena require further analysis for various surface angles and the obtained constant heat flux data provide a good foundation for such future work.

Keywords

References

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