A series of experiments was conducted to observe nucleate boiling phenomena in horizontal tubes with inner diameters varying from 0.05 mm to 3.0 mm. Diverse behaviors of bubble growth were explored, identified by which tubes were classified into micro, mini and macro scales. In micro tubes (Di ≤ 200 μm), the liquid was emitted instantaneously with extremely fast liquid-vapor interfacial movement, referred as explosive emission boiling phenomenon. It is hard to record bubble growth process with high speed camera. In mini tubes (200 μm < Di < 2.5 mm), though liquid was also emitted outsides, the interface moves relative slow and the whole process of bubble growth can be observed. Two distinct stages, referred as spherical and oblate bubble growth stages, were divided. In macro tubes (Di ≥ 2.5 mm), only spherical bubble growth stage exists and the growth rate is much smaller than that in mini tubes. Furthermore, the mechanism of diverse bubble dynamics was analyzed. In mini/micro tubes, decreasing tube diameter can trigger a transition from spherical to oblate bubble growth and consequently establish a thin film between liquid-vapor interface and heated wall. The thin liquid film evaporates vigorously and accelerates the interfacial movement, which reversely enhances evaporation of thin film. A positive interaction between interfacial movement and thin film evaporation establishes, resulting in the interface moving faster and faster and consequently emitted liquid outsides instantaneously. In macro tubes, as tube diameter increasing, the transition and sequential positive interaction can not be raised. Hence, the bubble maintains growing spherically as that in pool boiling.
Skip Nav Destination
ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels
June 19–22, 2011
Edmonton, Alberta, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4463-2
PROCEEDINGS PAPER
Experimental Observation on Bubble Dynamics During Nucleate Boiling in Micro/Mini/Macro Tubes
Yuan-yuan Duan,
Yuan-yuan Duan
Tsinghua University, Beijing, China
Search for other works by this author on:
Zhen Yang
Zhen Yang
Tsinghua University, Beijing, China
Search for other works by this author on:
Di Wu
Tsinghua University, Beijing, China
Ying Piao
Tsinghua University, Beijing, China
Yuan-yuan Duan
Tsinghua University, Beijing, China
Zhen Yang
Tsinghua University, Beijing, China
Paper No:
ICNMM2011-58208, pp. 101-107; 7 pages
Published Online:
May 11, 2012
Citation
Wu, D, Piao, Y, Duan, Y, & Yang, Z. "Experimental Observation on Bubble Dynamics During Nucleate Boiling in Micro/Mini/Macro Tubes." Proceedings of the ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 1. Edmonton, Alberta, Canada. June 19–22, 2011. pp. 101-107. ASME. https://doi.org/10.1115/ICNMM2011-58208
Download citation file:
8
Views
Related Proceedings Papers
Related Articles
Nucleate Boiling Comparison between Teflon-Coated Plain Copper and Cu-HTCMC in Water
J. Heat Transfer (August,2018)
Bubble Behavior in Pool Boiling Heat Transfer between Two Plates with a Narrow Gap
J. Heat Transfer (March,2020)
Theoretical Model for Nucleate Boiling Heat and Mass Transfer of
Binary Mixtures
J. Heat Transfer (December,2003)
Related Chapters
Numerical Simulation of Nucleate Spray Cooling: Effect of Droplet Impact on Bubble Growth and Heat Transfer in a Thin Liquid Film
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Pool Boiling
Thermal Management of Microelectronic Equipment, Second Edition
Template-Based Evaluation of High Speed Video Recording of Bubble Formation with Pool Boiling of Propane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)