SPH Analysis of Free Surface Flow over Pivot Weirs

Mahdavi, Ali; Shahkarami, Nazanin

doi:10.1007/s12205-020-0095-1

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…Bijankhan and Ferro (2018) employed the OpenFOAM software, which is based on the Reynolds-averaged Navier-Stokes equations, to examine the influence of the angle of inclination on the discharge characteristics. More recently, the method of smoothed particle hydrodynamics was utilized to analyze the two-dimensional (2D) structure of the gate overflow (Mahdavi and Shahkarami, 2020). In comparison with previous investigation results (e.g.…”

Section: Introductionmentioning

confidence: 85%

Free-flow discharge characteristics of an overshot gate: A non-hydrostatic numerical modeling approach

Zerihun

2022

Acta Hydrotechnica

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Overshot gates, such as the Lay-flat gate, have been used extensively as a flow-measuring structure in open-channel irrigation conveyance systems. Despite their simple geometric shape, the free flow over such structures possesses a substantial curvature of streamline and a steep free-surface slope, thereby making the assumption of a hydrostatic pressure distribution invalid. Accordingly, the shallow-water approach becomes inapplicable for analyzing their discharge characteristics. Using the depth-averaged Boussinesq-type model, the critical flow conditions based on this lower-order approach were extended, leading to an equation for the free-flow coefficient of discharge that implicitly incorporates the flow’s dynamic effects. The developed model was tested for free-flow cases, with a satisfactory agreement between computational results and experimental data. Overall, it was shown that the proposed model is capable of accurately simulating a sharply-curved flow over an overshot gate. The study found that the relative overflow depth prominently affects the characteristics of the curvilinear transcritical flow and hence the free-flow coefficient of discharge. Furthermore, the angle of inclination has a moderate influence on the discharge characteristics of a full-width overshot gate with a face slope flatter than 56°.

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Section: Introductionmentioning

confidence: 85%

Free-flow discharge characteristics of an overshot gate: A non-hydrostatic numerical modeling approach

Zerihun

2022

Acta Hydrotechnica

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“…According to Fig. 11, it demonstrates that the accuracy of all three improved models is significantly increased in comparison (22) f (x, y) = sin(10(x + y)) The numerical errors of the second PDE using the Laplacian models for the multiresolution node distributions shown in Fig. 10 with appropriate R s ∕L 0 with the standard approaches for the multi-resolution node distributions, while model 4 shows considerable ability to produce more accurate solution.…”

Section: Elliptic Partial Differential Equationsmentioning

confidence: 98%

“…Function and spatial derivative approximations are performed using the theory of integral interpolants based on kernel or weight functions. Recently, SPH has been successfully applied to study many different fluid flow problems such as gravity currents [23], propagation of impulsive waves due to landslides [2], wave interactions with porous media [29], ground flow simulation [21], free surface viscoelastic flows [24], droplet collisions [13], multiphase flows [25], wave-structure interaction [34], fluid-elastic structure interactions [18], the simulation of some chemotactic bacteria patterns in liquid medium using a generalized SPH method [7] and free surface flow over pivot weirs [22]. Because of the practical aspects and complex nature of fluid flows, many different studies have been accomplished to address some intrinsic challenges of numerical methods in dealing with such problems.…”

Section: Introductionmentioning

confidence: 99%