Dropwise condensation of humid air at polymer surfaces

本文对流动湿空气在垂直高分子表面的滴状凝结换热进行了实验研究。将研究以下参数的影响：速度，温度和湿度的空气和基板表面的过冷，以及。局部传热系数通过评估表面下测量的温度数据来确定。液滴的生长和运动将使用显微镜和红外热成像仪进行检查。传热分析将通过结合树枝的结果使用综合方法进行。基于目视观察和传热测量，将建立液滴生长、聚结和运动的物理模型。这对进一步理解剪切力作用下湿空气的非均相滴状冷凝具有重要意义。

Dropwise condensation heat transfer from flowing humid air to a vertical polymer surface will be investigated experimentally. The effects of the following parameters will be studied: velocity, temperature and humidity of the air and sub cooling of the substrate surface, as well. Local heat transfer coefficients are determined by evaluating temperature data, measured just beneath the surface.The growth and movement of the droplets will be examined using microscopy and infrared thermography. The analysis of heat transfer will be done using a comprehensive approach by combining results of the tree branches. Correlations will be given.Based on visual observations and heat transfer measurements, a physical model will be developed for growth, coalescence and the movement of the droplets. This is valuable to enlarge the understanding of heterogeneous dropwise condensation of moist air under the impact of shear stresses.