Numerical Simulation for Influence of Baffle Length on Hydraulic Characteristics in Radial Sedimentation Tanks

Abstract

Abstract: The VOF (volume of fluid) method was applied to track the free water surface, and the RNG turbulent model was used to close the two-phase flow time-averaged equations. The influence of inlet vertical baffle with different lengths on hydraulic characteristics in radial sedimentation tank was simulated and analyzed. The control equations were discretized using the finite volume method. Velocity and pressure were solved using the PISO (Pressure-Implicit with Splitting of Operators) algorithm. The research results show that: the long length feed flow baffle model has a smaller recirculation zone, better velocity field distribution than short length baffle, and the long length feed flow baffle model is conducive to improve sedimentation efficiency. The results can provide a reference for optimization design of an actual engineering of sedimentation tanks.

Key words: sedimentation tank, numerical simulation, hydraulic characteristics, flow field

CLC Number:

TP391.9

Wei Wenli, Zhang Zewei, Hong Yunfei, Liu Yuling. Numerical Simulation for Influence of Baffle Length on Hydraulic Characteristics in Radial Sedimentation Tanks[J]. Journal of System Simulation, 2016, 28(4): 826-832.

References

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