Dropwise condensation of humid air at polymer surfaces

从流动的潮湿空气到垂直聚合物表面的水滴冷凝传热将进行实验研究。以下参数的影响将被研究：速度，空气的温度和湿度以及基材表面的过冷。局部传热系数是通过评估地表下测量的温度数据来确定的。液滴的生长和运动将使用显微镜和红外热成像检查。传热分析将采用综合方法，结合树枝的结果来完成。将给出相关性。根据目视观察和传热测量，将为液滴的生长、凝聚和运动建立一个物理模型。这对扩大对剪切应力作用下湿空气非均匀滴状凝结的认识是有价值的。

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.