SPH Modelling of Hydraulic Jump Oscillations at an Abrupt Drop

Padova, Diana De; Mossa, Michele; Sibilla, Stefano

doi:10.3390/w9100790

Cited by 33 publications

(20 citation statements)

References 65 publications

(117 reference statements)

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“…Due to its mesh-free nature, SPH can capture these complex free surface patterns much better than the RANS modeling techniques. Besides, the more recent promising SPH applications in the water field have been vigorously demonstrated by [49,50]. …”

Section: Discussionmentioning

confidence: 99%

SPHysics Simulation of Experimental Spillway Hydraulics

Ren

Wang

et al. 2017

Water

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Abstract:In this paper, we use the parallel open source code parallelSPHysics based on the weakly compressible Smoothed Particle Hydrodynamics (WCSPH) approach to study a spillway flow over stepped stairs. SPH is a robust mesh-free particle modelling technique and has great potential in treating the free surfaces in spillway hydraulics. A laboratory experiment is carried out for the different flow discharges and spillway step geometries. The physical model is constructed from a prototype reservoir dam in the practical field. During the experiment, flow discharge over the weir crest, free surface, velocity and pressure profiles along the spillway are measured. In the present SPH study, a straightforward push-paddle model is used to generate the steady inflow discharge in front of the weir. The parallelSPHysics model is first validated by a documented benchmark case of skimming flow over a stepped spillway. Subsequently, it is used to reproduce a laboratory experiment based on a prototype hydraulic dam project located in Qinghai Province, China. The detailed comparisons are made on the pressure profiles on the steps between the SPH results and experimental data. The energy dissipation features of the flows under different flow conditions are also discussed. It is shown that the pressure on the horizontal face of the steps demonstrates an S-shape, while on the vertical face it is negative on the upper part and positive on the lower part. The energy dissipation efficiency of the spillway could reach nearly 80%.

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Section: Discussionmentioning

confidence: 99%

SPHysics Simulation of Experimental Spillway Hydraulics

Ren

Wang

et al. 2017

Water

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“…Patrick Jonsson et al [34] based on SPH method, studied the characteristics of hydraulic jump with periodic boundary. Padova et al [35] used WCSPH model to simulate the transition from supercritical to subcritical flow at an abrupt drop for obtaining a deeper understanding of the physical features of a flow.…”

Section: Introductionmentioning

confidence: 99%

SPH Simulation of Hydraulic Jump on Corrugated Riverbeds

Luo

et al. 2019

Applied Sciences

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This paper presents a numerical study of the hydraulic jump on corrugated riverbed using the Smoothed Particle Hydrodynamics (SPH) method. By simulating an experimental benchmark example, the SPH model is demonstrated to predict the wave profile, velocity field, and energy dissipation rate of hydraulic jump with good accuracy. Using the validated SPH model, the dynamic evolvement of the hydraulic jump on corrugated riverbed is studied focusing on the vortex pattern, jump length, water depth after hydraulic jump, and energy dissipation rate. In addition, the influences of corrugation height and length on the characteristics of hydraulic jump are parametrically investigated.

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“…However, these models [27,34] do not consider the effect of bed roughness on fluid turbulence, and the near-wall particle distribution is chaotic. Recently, De Padova et al [35] investigated undular hydraulic jumps over small-scale rough bed for bed roughness of 0.02H, where H denotes the water depth. e SPH mixing-length turbulence model exhibits satisfactory performance for simulating hydraulic jump as long as strong turbulent rollers are not present and is applicable for openchannel flow simulation [25,36].…”

Section: Introductionmentioning

confidence: 99%

A Meshless WCSPH Boundary Treatment for Open-Channel Flow over Small-Scale Rough Bed

Shen

Wei

et al. 2019

Mathematical Problems in Engineering

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A weakly compressible smoothed particle hydrodynamics (WCSPH) method was developed to model open-channel flow over rough bed. An improved boundary treatment is proposed to quantitatively characterize bed roughness based on the ghost boundary particles (GBPs). In this model, the velocities of GBPs are explicitly calculated by using evolutionary polynomial regression with a multiobjective genetic algorithm. The simulation results show that the proposed boundary treatment can well reflect the influence of wall roughness on the vertical flow structure. A fully developed open channel is established, and its flume length, processing time, and turbulent model are discussed. The mixed-length-based subparticle scale (SPS) turbulence model is adopted to simulate uniform flow in open channel, and this model is compared with the Smagorinsky-based one. For the modified WCSPH model, the results show that the calculated vertical velocity and turbulent shear stress distribution are in good agreement with experimental data and fit better than the calculations obtained from the traditional Smagorinsky-based model.

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SPH Modelling of Hydraulic Jump Oscillations at an Abrupt Drop

Cited by 33 publications

References 65 publications

SPHysics Simulation of Experimental Spillway Hydraulics

SPHysics Simulation of Experimental Spillway Hydraulics

SPH Simulation of Hydraulic Jump on Corrugated Riverbeds

A Meshless WCSPH Boundary Treatment for Open-Channel Flow over Small-Scale Rough Bed

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