Experimental Study of Heating Surface Angle Effects on Single Bubble Growth

• Published in: Journal of mechanical science and technology Vol. 20; no. 11; pp. 1980 - 1992
• Main Authors: Kim, Jeongbae, Kim, Hyung Dae, Lee, Jangho, Kwon, Young Chul, Kim, Jeong Hoon, Kim, Moo Hwan
• Format: Journal Article
• Language: English
• Published: Seoul 대한기계학회 01.11.2006; Korean Society of Mechanical Engineers; Springer Nature B.V
• Subjects: Boiling; Bubbles; Condensed matter: structure, mechanical and thermal properties; Contact angle; Drops and bubbles; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Fluid dynamics; Fundamental areas of phenomenology (including applications); Heat; Heat flux; Heat transfer; High speed; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Liquid-vapor transitions; Mechanical instruments, equipment and techniques; Micromechanical devices and systems; Nonhomogeneous flows; Physics; Pools; Specific phase transitions; Studies; 기계공학; Surface Angle; Nucleate Pool Boiling; Constant Heat Flux; Circular Heater; Single Bubble Growth; Artificial Cavity; Heat sources; Heat flow; Contact angle; Surface analysis; Experimental study; Boiling; Space heating; Cavities; Bubbles; High speed; Speed control; Mechanical contacts; High speed cinematography; Microelectromechanical device
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/BF03027591

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.[PUBLICATION ABSTRACT]