Particle packing efficiency (IMAGE) University of Tokyo Caption Examples of packing patterns for polydisperse systems numerically produced by the researchers’ model. Credit ©2023 Yanagisawa and Shimamoto Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.