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Abstract
The turbulence characteristics of submerged hydraulic jumps have been investigated numerically by means of the standard k-ε turbulence model. The concept of a fractional volume of fluid (VOF) is employed to track the moving free surface. Numerical predictions include surface profiles, hydrodynamic pressures, mean velocities, turbulence intensities and shear stresses, maximum horizontal velocities and friction coefficients along the channel bed. Computational results are presented for Froude numbers ranging from 3.2 to 8.2 and submergence factors ranging from 0.24 to 0.85. The results are compared with available experimental data. They provide insights into both the macroscopic structure and the turbulent structure of submerged hydraulic jumps.