Verification & Validation of the Numerical Simulation for Free Surface and Pressure Distributions in Steep Slope Flow

Key Points

• This research assesses the reliability of numerical simulations for drainage structures under steep slope flow.
• Focused on vertical drainage channels within slope drainage structures.
• Applied verification and validation (V&V) frameworks to the numerical analysis.
• Utilized the VOF method in the open-source fluid analysis tool OpenFOAM.
• Conducted grid convergence index (GCI) assessments to check grid convergence and compared with experimental data.
• Demonstrated reproducibility of bottom surface pressure and water surface shape.
• Identified numerical diffusion challenges due to decreased grid orthogonality.