MEMS センサを用いたミニチャネル内沸騰におけるミクロ液膜厚さ・蒸発量の評価

抄録

Formation and evaporation mechanisms of the microlayer beneath a flat bubble of water in the mini-channel have been investigated by measuring the local wall temperature and the steam temperature in bubble with MEMS thermal sensor, T.C. having the diameter of 25μm and a high speed observation. The initial microlayer thickness and evaporation thickness were evaluated from the local wall heat flux by one–dimensional transient heat conduction analysis with the wall temperature data. The dimensionless initial microlayer thickness and evaporation thickness increased with Capillary number corresponding to the ratio of the viscous force and the surface tension.