Abstract
The objective of this study is to investigate heat transfer mechanism of nucleate boiling with MEMS (Micro-Electro-Mechanical systems) sensor fabricated for boiling research. In the experiment Temperature variation beneath an isolated bubble under nucleate boiling condition of saturated water was measured with the sensor. Measured temperature data presents microlayer evaporation and expansion of dry-out area in bubble growth process and rewetting of the dry-out area in bubble departure process. Additionally, heat transfer from the heated surface was evaluated by calculating local heat flux by transient heat conduction analysis with the measurement data as a boundary condition. Spatial distribution of initial microlayer thickness was also computed with the derived local heat flux.
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