Application Abstract: Wettability of the heating surface is an important factor that influences the boiling heat transfer.Mixed wettability surfaces combine the advantages of the wholly hydrophilic and wholly hydrophobic surface,with low onset of nucleate boiling temperature,high boiling heat transfer coefficient and high critical heat flux.In order to identify the boiling heat transfer mechanism on the mixed wettability surfaces,the proposal aims to investigate the evaporation characteristics of the microlayer underneath the boiling bubble and carry out the following work:(1)Measurement of the dynamic behaviors of the microlayer underneath the boiling bubbles by combining the high-speed photography technology and the laser interferometry method;(2)Measurement of the temperature field of the fluid around the bubble and the heating surface by real time holographic interferometry.(3)Proposing heat transfer models for bubble growth at different stages of the boiling heat transfer based on the theoretical models and experimental data of microlayer.
