An investigation of the gravity effects on pool boiling heat transfer via high-fidelity simulations
نویسندگان
چکیده
• High fidelity simulations of boiling in microgravity. Block structured grid with adaptive mesh refinement (AMR). Statistical description fluid flow and heat transfer. Characterization near wall physics, bubble merger interactions. Validation existing experiments published results. Nucleate pool are carried out to study the effects gravity on dynamics formation, departure, mutual We focus identifying dominant trends associated thermal behavior at different levels using fixed values superheat liquid subcooling. This is accomplished by measuring contributions flux turbulent resulting from interaction. The time averaged fluctuations velocity temperature indicate that conditioned wetted surface area - provides a useful indication high hot spots. Furthermore, despite substantial differences large scale bubbles levels, average region found be dominated sliding type events small over wide range levels. significance near-wall, reflected transition vorticity structures hairpin vortices near-wall vortex ring patterns away wall. While maximum value occurs for earth normal gravity, peak only slightly lower similar magnitude case low gravity. These observations reveal affecting transfer which was previously thought bubbles, particularly
منابع مشابه
Experimental Investigation in Pool Boiling Heat Transfer of Pure/Binary Mixtures and Heat Transfer Correlations
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2021
ISSN: ['1879-2189', '0017-9310']
DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2021.121826