Temperature effect of phase transition radiation of water

Phase transition radiation;Radiative transfer;Temperature effect;Water

Wu, Wei-Hsuan ; Brewster ; M. Quinn

关键词: Phase transition radiation;    Radiative transfer;    Temperature effect;    Water;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/31033/Wu_Wei-Hsuan.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Phase transition radiation of water revealed in the past provides a possible idea to modify weather predictions nowadays into more accurate ones. With existence, characteristic wavelength, and mechanisms of this phase transition radiation presenting by scientists and engineers, temperature effect of such radiation is studied in this research to obtain more knowledge on this phenomenon.Experiments and computer simulations of transmissivity tests as well as results discussion are performed in this study. A mixture of liquid and vapor water is generated while letting IR radiation at 3.1-4.95 passing through. A detector is used to measure photon counts serving as radiation intensity of two conditions, with mixture, and without mixture. Transmissivity at different volume fraction of liquid water is calculated by manipulating measurements of photon counts. The results of Monte Carlo transmissivity simulation at considered conditions match experimental data, indicating that phase transition must be included whenever phase transitions occur. Temperature effect is discussed by comparing experimental and simulation results at different temperatures. Transmissivity at another temperature is expected to predict well using the conditions shown in this research.