Characteristics of time series development and formation mechanism of icing interface strain under three-dimensional freezing conditions

Abstract

In order to reveal the ice adhesion mechanism, this study proposes an ice/workpiece interface strain picking method and establishes a coupled numerical model of water phase change heat transfer and mechanics. The interfacial strain law of the workpiece surface with/without water during the water freezing process was investigated, and the time development characteristics of the water freezing interfacial strain were analysed. The results show that the water freezing interface strain goes through a rapid increase during the rapid cooling stage of water, a strain fluctuation stage under the mixed state of ice and water, and a stabilisation stage after the completion of the phase transformation. As the cooling temperature decreases, the strain generated by water in the subcooled state is gradually larger than the strain of the workpiece contracted at low temperature, the trend of water phase transformation and volume increase is more and more significant, and the maximum freezing interfacial strain on the surface of the workpiece increases gradually. The interfacial strains and deformations of different materials show similar trends, but there are differences in the frozen interfacial strains, which are related to the modulus of elasticity and coefficient of thermal expansion of the materials. The results of this study can help to understand the adhesion mechanism of ice on the material surface, and provide a reference for the engineering field in terms of anti-icing, de-icing and icing.