Modelling of Phase Change Heat Transfer System for Micro-channel and Chaos Simulation

The dynamic properties for the micro-channel phase change heat transfer system are studied by theoretical method combined with experiment. Liquid--vapour interface dynamic systems are obtained by introducing disjoining pressure produced by three phase molecular interactions and Lie algebra
analysis. Experiments for 0.6mm×2mm rectangular micro-channel are carried out to obtain the pressure time serials. Power spectrum density analysis for these serials shows that the system is in chaotic state if the frequency is above 7.39Hz. The result indicates that the high heat transfer performance of the micro channel phase change system may relate to the characteristics
of chaos. The chaos attractor is drawn by the simulation of the obtained differential dynamic system under the conditions of our experiment.