Albert S. Kim Professor and Graduate Chair Department of Civil and Environmental Engineering University of Hawai'i at Mānoa   Hydrodynamic impacts and interactions between fluid flow and solid objects--both moving and stationary--are of great importance in various engineering disciplines from nano- to ocean-scale phenomena. These processes include aggregate/aggregation dynamics of sub-micron particles (as point masses), granular dynamics (as inelastic bodies of finite volumes) for pharmaceutical manufacturing processes and sediment transport in ocean engineering, and classical dynamics of rigid bodies as big as vehicles and shipping containers. Although the collision and constraint dynamics applications have vast length-scale ranges, the principles and