抄録
Different modes of transition from dropwise to film condensation were investigated analytically and experimentally. Two types of shift modes, the continuous mode and the discontinuous mode, were measured and the jumping phenomena were observed. The surfaces for dropwise condensation used were of two kinds : a ptfe-coated and a trilauryl trithiophosphite adsorbed surface. The dominant heat transfer mechanism was discussed and the factors determining the shift modes were analyzed. Close agreement between the measured and the analytical values were obtained. It was clarified that the phenomena determining the shift modes were controlled by the heat flux gradient in the logarithmic scale and by the conductance ratio of the vapor-side heat transfer and the overall cooling-side conductance.
