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Water 2017, 9(8), 565;

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
Department of Civil, Construction and Environmental Engineering, University of Napoli Federico II, Napoli 80125, Italy
College of Civil Engineering, Guizhou University, Guiyang 550025, China
Author to whom correspondence should be addressed.
Received: 29 June 2017 / Revised: 18 July 2017 / Accepted: 20 July 2017 / Published: 27 July 2017
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Aerated flows are characterized by complex hydrodynamics and mass-transfer processes. As a Lagrangian method, smoothed particle hydrodynamics (SPH) has a significant advantage in tracking the air-water interface in turbulent flows. This paper presents the application of an SPH method to investigate hydrodynamics and reaeration over stepped spillways. In the SPH method, the entrainment of dissolved oxygen (DO) is studied using a multiphase mass transfer SPH method for reaeration. The numerical results are compared with the hydrodynamics data from Chanson and DO data from Cheng. The simulation results show that velocity distribution and the location of free-surface aeration inception agree with the experimental results. Compared with the experimental results, the distribution of DO concentration over the stepped spillway is consistent with the measurement results. The study shows that the two-phase DO mass transfer SPH model is reliable and reasonable for simulating the hydrodynamics characteristics and reaeration process. View Full-Text
Keywords: SPH; stepped spillway; hydrodynamics; reaeration SPH; stepped spillway; hydrodynamics; reaeration

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Wan, H.; Li, R.; Gualtieri, C.; Yang, H.; Feng, J. Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method. Water 2017, 9, 565.

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