Numerical Simulation of Flow Structures Around Developing 3d Antidunes

Key Points

• The aim is to analyze the flow structures around developing 3D antidunes using numerical simulation techniques.
• Conducted numerical simulations to analyze flow structures around 3D antidunes.
• Used density function method and nonlinear k-epsilon model to compute flow fields.
• Focused on flow characteristics near the bed during antidune formation.
• Confirmed significant decrease in downstream flow velocity near the bed.
• Lateral flow in crest area shifts away from the mound toward sidewalls.
• Flow direction in trough area converges toward the valley.
• Vertical flow shows upward movements near the crest and downward movements across the trough.