Microscope activation near the wall during explosive boiling |
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Authors: | Jian Feng Lu J Ding |
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Institution: | (1) School of Engineering, Sun Yat-Sen University, 510006 Guangzhou, China |
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Abstract: | The inception process of nucleation in explosive boiling systems is theoretically investigated. With the effect of pulse heating
or sudden cooling, the temperature distribution near the surface during explosive boiling is calculated. The liquid near the
wall can maintain a stable layer induced by strong attractive force, and there exists maximum supersaturation beyond this
stable layer. As the surface temperature and temperature gradient are high enough, the critical distance of maximum supersaturation
can be larger than the radius of critical bubble, and the homogeneous nucleation will dominate the inception boiling process.
For explosive boiling induced by pulse heating, homogeneous nucleation forms after a short time; while homogeneous nucleation
can dominate the initial explosive boiling induced by sudden cooling. |
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Keywords: | |
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