Extraction and evolution of bubbles attributes in a two-phase direct contact evaporator
作者： Qingtai Xiao , Qin Gao , Jing Zhang , Jianxin Xu , Jianxin Pan
DOI: 10.1016/J.IJHEATMASSTRANSFER.2018.04.002
关键词:
摘要: Abstract Understanding the bubble regimes is a fundamental step toward conducting heat transfer enhancement. The non-invasive measurement of mixing inside direct-contact process, using direct video imaging technology, provides powerful opportunities for characterising visual observations phenomena and quantifying process complexities previously. Experimental shape feature parameters were obtained by means photographic recording technique evaporator. Four design factors with three levels respectively analysed system that involves exchange between two immiscible fluids (continuous dispersed phases). Using Ripley’s K function, new results are presented two-phase flow which can distinguish differences in behavior phase. In all cases considered, quantitative comparisons evolution curves representing different experimental conditions conducted reported data. Following local curve, current also be processed to provide time found good agreement available relationship bubbles volumetric coefficient was highly independent on parameters.
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