A Numerical Modeling Framework for Cohesive Sediment Transport Driven by Waves and Tidal Currents

To develop a robust multi-phase, multi-class numerical modeling framework for both cohesive and non-cohesive sediment transport in the fluvial, estuarine and coastal environments. OBJECTIVES 1. Developing a 3D turbulence-resolving numerical model for fine sediment transport in the oscillatory boundary layer in order to understand how turbulence-sediment interactions can determine the state of muddy seabed (transport modes). 2. Studying the attenuation of turbulence due to the presence of sediment via the interplay between sediment-induced density stratification and enhanced viscosity (rheological stress). 3. Extending the existing turbulence-resolving numerical study to coarser grain (sand) and poly-dispersed (e.g., size, density and shape) transport based on four-way-coupled Eulerian and Euler-Lagrangian numerical frameworks. SIGNIFICANCE Understanding various modes of sediment transport and the resulting transport rate drive