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Research Papers: Evaporation, Boiling, and Condensation

Bubble Dynamics for Nucleate Pool Boiling of Electrolyte Solutions

[+] Author and Article Information
Seyed Ali Alavi Fazel1

Department of Chemical Engineering, Islamic Azad University, Mahshahr, Khuzestan Province 63519, Iran

Seyed Baher Shafaee

Department of Chemical Engineering, Islamic Azad University, Mahshahr, Khuzestan Province 63519, Iranbahershafaee@yahoo.com

1

Corresponding author.

J. Heat Transfer 132(8), 081502 (Jun 10, 2010) (7 pages) doi:10.1115/1.4001315 History: Received September 06, 2009; Revised February 15, 2010; Published June 10, 2010; Online June 10, 2010

Bubble dynamics is the most important subphenomenon, which basically affects the nucleate pool boiling heat transfer coefficient. Previous investigations state that the effect of physical properties of liquid and vapor phases on bubble departure diameter are often conflicting. In this article, extensive new experimental data are presented for the bubble departure diameter for various electrolyte aqueous solutions over a wide range of heat fluxes and concentrations. Experimental results show that the bubble detachment diameter increase with increasing either boiling heat flux or electrolyte concentration. Experimental results also present a close relation between the dimensionless capillary and bond numbers. A new model for the prediction of vapor bubble departure diameter in nucleate boiling for the electrolyte solutions is proposed, which predicts the experimental data with a satisfactory accuracy.

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Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

The experimental apparatus design

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Figure 2

Typical comparison between existing models and experimental data of bubble diameter

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Figure 3

Measured static equilibrium of surface tension of tested solutions

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Figure 4

Different stages of bubble generation on the surface

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Figure 5

Experimental versus predicted bubble departure diameter for all test solutions and different correlations

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