Research Initiation Award: Visualization of Surface Temperature Distributions in Incipient Boiling Using Liquid Crystal Thermography

本项目采用时变液晶热成像技术 捕捉到的初期水池现象， 介电流体 结果集中在两个问题上： 整个加热表面的温度分布，以及 初始沸腾的固有瞬态特性 现象 该技术产生了一个时间序列， 表面温度分布的图像。 这些图像 显示了当系统 接近、穿过并维持核池 沸腾了 特别感兴趣的是瞬态过程， 成核位点激活并在数量上增长， 取代单相对流。 表面的影响 制备、流体过冷和溶解气体含量 将被调查。 结果包括实时颜色 图像和空间平均表面的测量 温度和表面温度谱 配置.

This project uses time-dependent liquid crystal thermography to capture images of the incipient pool phenomenon in dielectric fluids. The results focus on two issues: the distribution of temperature across the heated surface, and the inherently transient nature of the incipient boiling phenomenon. The technique produces a temporal sequence of images of the surface temperature distribution. These images show the surface temperature patterns as the system approaches, passes through, and sustains nucleate pool boiling. Of particular interest is the transient process by which the nucleation sites activate and grow in number to displace the single-phase convection. The effects of surface preparations, fluid subcooling, and content of dissolved gases will be investigated. The results include real-time color images, and measurements of the spatial-averaged surface temperature and surface temperature spectra for selected configurations.