Numerical simulation of submerged hydraulic jump downstream of the sluices with low froude number

Based on solving Reynolds averaged Navier-Stokes equations,the submerged hydraulic jump was simulated numerically with the Froude number 3.19.The standard turbulence model and RNGmodel with the tracking method of free surface were used to simulate numerically the submerged hydraulic jump.The free surface profile,mean velocity,turbulent kinetic energy and velocity vector were obtained.Combined with experimental data,a detailed study of some main results was done by comparing the two models.And the inner flow field characteristics of submerged hydraulic jump with the Froude number 3.19 were analyzed.It is indicated that RNGmodel performed better in the aspects of the turbulent structure and the macroscopic water flow structure for submerged hydraulic jump with low Froude number.It is also showed the hydraulic jump developing region where X/Y1 from 2 to 24.Surface roller was found to play an important role in turbulence generation and dissipation.