冷たい微細溝付きガラス面に衝突する過冷却水滴の凍結

抄録

Ice accretion causes serious problems, such as low visibility of windshield of vehicles and low performance of aircraft wings. In these examples, impinging water droplets are often in the state of supercooled. However, the impinging water droplets in many previous studies were not in the actual state. Thus, we carried out experiments of supercooled water droplets impinged on cold specimens. We adopted glass plates with micro-scale lattice-patterned grooves as the specimens because they can attenuate the frost layer growth. It was found from the experiments that the completion time of the droplet freezing was prolonged compared with that for a bare glass plate, irrespective of the droplet temperature.