水滴撞击倾斜非Newton除冰液液膜动力学行为特性数值研究OA北大核心CSTPCD

To investigate the non-Newtonian dynamic behavior of water droplets hitting deicing fluid films un-der rainy weather conditions,the phase interface control equation was coupled with the component transport e-quation to construct a dynamic behavior model for multi-phase,multi-component and multi-system coupling ac-tions of droplets hitting non-Newtonian liquid films.The non-steady-state evolution characteristics of water droplets hitting deicing fluid films were numerically studied,and the model was validated and modified based on experimental results.Furthermore,the influence mechanisms of shear-thinning characteristics of the deicing fluid and slope gradients on the impact process were further analyzed.The results indicate that,an asymmetric liquid crown will form after a droplet impacts the inclined liquid film.The viscosity disparity resulting from the non-Newtonian characteristics of the deicing liquid further contributes to the asymmetrical motion following the impact.During the formation of the liquid crown,the deicing liquid is taken away from the film,and the dilu-tion effect of water reduces the film viscosity.Increasing the slope restricts the upstream range of water drop-lets,facilitating the growth of the downstream liquid crown and accelerating the deicing of the film.Conse-quently,the viscosity of the downstream liquid film significantly decreases.