Theoretical and experimental study of the heterogeneous bubble nucleation in boiling of pure liquids and binary mixtures based on Gibbs free energy analysis and heated surface characteristics
Liang Liu , Le Liu , Ying Xu , Yan Li , Hui Han , Yuxing Li , Jianlu Zhu
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引用次数: 0
Abstract
The onset of nucleate boiling (ONB) conditions significantly impact the performance of boiling heat transfer. Predicting and optimizing these conditions is crucial in various industrial applications. In this paper, the nucleation critical conditions for the heterogeneous boiling nucleation of both pure liquids and mixed liquids are established based on the stricter critical nucleation criterion of dΔGhetero/dr = 0. Additionally, a computation approach for predicting the ONB conditions of heterogeneous boiling in non-visible situations is developed by considering the characteristics of heated surface morphology and heat transfer. An experimental setup is constructed to validate the computational method by measuring the ONB superheat and heat flux of pure liquid and binary mixtures. The results demonstrate that the error between the model calculations and experimental values is within the range of ±20 %. Moreover, insights into the control mechanism of regular cavity surfaces on ONB conditions and nucleation sites are obtained, leading to the development of techniques for manipulating surface conditions to optimize the ONB. The findings reveal that as the wall superheat increases, the surface with regular micro-cavities shows a significantly lower transient change in nucleation density.
期刊介绍:
International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.