Transparent droplet surface morphology measurement method based on digital image correlation
The measurement and analysis of the morphology of liquid droplets on solid surfaces is an important step in exploring solid-liquid interactions and characterizing surface properties.However,transparent droplets are often challenging to image in optical systems,making full-field morphology measurements difficult.This paper presented a novel method for measuring the three-dimensional(3D)morphology of transparent liquid droplets by exploiting the displacement of the droplet-induced image and the imaging principle of refraction.Specifically,the proposed method involved using digital image correlation(DIC)technology to measure the image displacement caused by the droplet on the solid surface.A physical model based on refraction imaging was then established to relate the measured image displacement to the height of the liquid surface.Finally,the height of the liquid surface was determined by solving the measured image displacement,enabling the reconstruction of the 3D morphology of the droplet.Experimental results demonstrate that the proposed method is capable of accurately measuring the 3D morphology of liquid droplets on solid surfaces,even for irregular liquid surfaces.This technique provides valuable technical support for investigating droplet spreading,evaporation,and other related behaviors.
万方数据
维普
