Science Daily March 31, 2022
An international team of researchers (USA – University of Minnesota, Chile) has developed a method of high-speed stress microscopy, which measures the key dynamic properties of drop impact responsible for erosion, i.e., the shear stress and pressure distributions of impacting drops, with unprecedented spatiotemporal resolutions. Their experiments revealed the fast propagation of self-similar noncentral stress maxima underneath impacting drops and quantify the shear force on impacted substrates. They examined the deformation of elastic substrates under impact and uncovered impact-induced surface shock waves. The study opens the door for quantitative measurements of the impact stress of liquid drops and sheds light on the origin of low-speed drop-impact erosion. They plan to expand this research to study how different textures and materials change the amount of force created by liquid droplets…read more. Open Access TECHNICAL ARTICLE
Surface shock wave of drop impact. Credit: Nature Communications volume 13, Article number: 1703 (2022)Â