Experimental Observation and Measurements of Pool Boiling Heat Transfer Using PIV, LIF, FICM Techniques

摘要

Nucleate pool boiling is one of the most studied physical phenomena in science and engineering. For decades, research on pool boiling heat transfer has been restricted to empirical science, with very simple models based on hypotheses. As researchers start to develop more mechanistic models of nucleate-boiling heat transfer these days, the need for high-quality, high resolution data on bubble nucleation and growth cycle is increasing. This present study seeks to contribute detailed data on bubble dynamic parameters such as nucleation site density, bubble departure diameter, contact angles and frequency, as well as time-resolved whole-field liquid temperature and velocity measurements, and the time history of the liquid micro-layer thickness change. Particle image velocimetry (PIV), laser induced fluorescence (LIF) and reflection interference contrast microscopy (RJCM) techniques are to be used in this work to get measurement and observation of heat transfer mechanism at different scales. Some satisfying preliminary results have been obtained, and future work will focus on improvement of RICM measurements and PIV measurements. Such information is a valuable development and improvement of interfacial transport models used in CFD calculations.