Numerical Evaluation of Turbulence Models for Velocity Distribution Simulation in Hydraulic Jumps

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Mousavi S. N., Abbaszadeh H., Menazadeh ., Süme V., Saray .

Turkish Journal of Hydraulic, cilt.9, sa.2, ss.49-58, 2025 (Hakemli Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 2
  • Basım Tarihi: 2025
  • Dergi Adı: Turkish Journal of Hydraulic
  • Derginin Tarandığı İndeksler: EBSCO Legal Collection, EBSCO Legal Source, Directory of Open Access Journals, Index Copernicus, Asos İndeks
  • Sayfa Sayıları: ss.49-58
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

The research aims to identify the optimal turbulence model and mesh size for achieving close agreement between numerical and experimental results, contributing to the improvement of CFD applications for stilling basin design. This study simulates the velocity distribution of hydraulic jumps in a stilling basin with a smooth bed, under flow rates of 33–60 L/s and Froude numbers of 7–10. Four turbulence models—RNG, k-ε, k-ω, and LES—were evaluated to determine the most accurate model by comparing numerical results with experimental data from a 10 m long, 0.51 m wide laboratory flume. A mesh convergence study identified an optimal mesh size of 0.011 m, balancing accuracy and computational efficiency. The RNG turbulence model demonstrated superior performance, with the lowest relative error (RE = 5.41%) and absolute error (AE = 0.0065 m) for hydraulic head predictions, attributed to its robustness in capturing high-shear flows. These findings enhance the application of CFD in optimizing stilling basin designs for hydraulic structures.