On the Morphodynamics of a Wide Class of Large‐Scale Meandering Rivers: Insights Gained by Coupling LES With Sediment‐Dynamics

In meandering rivers, interactions between flow, sediment transport, and bed topography affect diverse processes, including bedform development channel migration. Predicting how these the spatial patterns magnitudes of deformation in rivers is essential for various river engineering geoscience problems. Computational fluid dynamics simulations can predict morphodynamics at fine temporal scales but have traditionally been challenged by large scale natural rivers. We conducted coupled large-eddy simulation to create a unique database hydro-morphodynamic data sets 42 with variety planform shapes large-scale geometrical features that mimic meanders. For each simulated river, includes (a) morphology, (b) three-dimensional mean velocity field, (c) shear stress distribution under bankfull flow conditions. The calculated results dynamic equilibrium revealed formation scour deposition near outer inner banks, respectively, while location point bars regions around apexes meander bends found vary as function radius curvature width ratio. A new mechanism proposed explains this seemingly paradoxical finding. high-fidelity generated work provide researchers scientists rich numerical distributions enable systematic investigation underlying phenomena support range applications.