Abstract
The lattice Boltzmann method studied the merging of double bubbles under different spacings in pool boiling. This paper analyzes the influence of bubble nucleation distance on heat transfer performance. According to the difference of nucleation distance within the scope of this article, the impact of bubble coalescence on bubble departure frequency can be divided into three regions: promotion, inhibitive, and promotion. The dynamic behavior of the bubble is linked with the heat flux, the heat flux evolution characteristics of different bubble separation distances are analyzed. The optimal nucleation distances were found to exist to achieve the maximum thermal transfer performance. The optimal distance is correlated with environmental factors such as superheat, heater length, and gravity. The main reason affecting the optimal separation distance is the bubble diameter. The larger the bubble leaves the diameter, the larger the optimal separation distance.
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