Finite Analytic Solution of Flow over spillways

Li, Wei; Xie, Qi; Chen, Ching-Jen

doi:10.1061/(asce)0733-9399(1989)115:12(2635)

Cited by 21 publications

(11 citation statements)

References 7 publications

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“…Use of finite-element analysis began with McCorquodale and Li (1971), who considered flow under a sluice gate. Many other studies have since appeared in the literature, including those reported by Bhajantri et al (2007aBhajantri et al ( , 2007b, Castro-Degado (1986), Chan et al (1973), Chanel and Doering (2008), Daneshmand and Kazemzadeh-Parsi (2004), Guayjarernpanishk andAsavanant (2009), Helmi andEl-Gamal (2011), Ikegawa and Washizu (1973), Li et al (1989), Petrila (2002), Sankaranarayanan and Rao (1996) and Vanden-Broek (1997).…”

Section: Introductionmentioning

confidence: 90%

Bottom outlet dam flow: physical and numerical modelling

Daneshmand¹,

Adamowski²,

Liaghat³

2014

Proceedings of the Institution of Civil Engineers - Water Manag

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This paper presents an analysis of flow parameters through a bottom outlet conduit with gated operation using physical and numerical models. A physical model of the regulating bottom outlet of Shahryar dam in Iran was used to investigate the hydraulic forces on the service radial gate and flow patterns within the conduit. The model was constructed from Plexiglas, and discharge and pressure data were recorded for different gate openings. The Froude law of similarity was satisfied in the hydraulic modelling, allowing for an investigation of the dynamic similarity of inertial and gravitational forces. The numerical scheme was based on using the natural-element method to study hydraulic forces and flow parameters within the conduit and the finite-element method to evaluate the natural frequencies of the radial gate. The results of the calculations for different radial gate openings showed good agreement with those from physical modelling for the pressure distributions throughout the flow domain and on the gate.

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Section: Introductionmentioning

confidence: 90%

Bottom outlet dam flow: physical and numerical modelling

Daneshmand¹,

Adamowski²,

Liaghat³

2014

Proceedings of the Institution of Civil Engineers - Water Manag

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“…Ikegawa & Washizu (1973) have studied spillway flow using the finite element method (FEM) by making considerable simplification of the basic problem. Most researchers have used either potential flow theory (Li et al 1989) or Reynolds-averaged Navier-Stokes (RANS) equations (Olsen & Kjellesvig 1998;Burgisser & Rutschmann 1999;Qun Chen et al 2002;Wei Wenli & Dai Huichao 2005) and available commercial codes (Bruce & Michael 2001;Jean & Mazen 2004). Unami et al (1999) developed depth-averaged 2-D numerical models of spillway flows using both FEM and FVM.…”

Section: Numerical Modelling Of Flow Over Spillwaymentioning

confidence: 99%

Hydrodynamic modelling of flow over a spillway using a two-dimensional finite volume-based numerical model

Bhajantri

Eldho

Deolalikar

2006

Sadhana

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Spillway flow, a classical problem of hydraulics, is generally a gravitydriven free surface flow. Spillway flows are essentially rapidly varying flows near the crest with pronounced curvature of the streamlines in the vertical direction. Two processes simultaneously occur in the flow over the crest, that is, formation and gradual thickening of the turbulent boundary layer along the profile, and gradual increase in the velocity and decrease in the depth of main flow. Spillway hydrodynamics can be obtained through physical modelling or numerical modelling. Physical modelling of spillways is expensive, cumbersome and time-consuming. The main difficulties in solving the spillway problem numerically are: rapidly varying flow, existence of both subcritical and supercritical flows, development of turbulent boundary layers, unknown free surface and air entrainment. Numerical simulation of such flows over spillways in all flow regimes is a challenging task. This paper describes a numerical model and its application to a case study to investigate the hydraulic characteristics of flow over spillway crest profiles by simulating the velocity distribution, pressure distribution and discharge characteristics. Results of the numerical modelling are compared with those from the physical modelling and found to be satisfactory.

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“…Most of the researchers have used either potential flow theory [2] or Reynolds-averaged NavierStokes (RANS) equations [3][4][5][6] and available commercial codes [7][8][9]. Unami et al [10] developed depth-averaged 2-D numerical model of spillway flow using both finite element method (FEM) and finite volume method (FVM).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effects of sluice spillway roof profiles on the hydraulic characteristics

Bhajantri

Eldho

Deolalikar

2007

Numerical Methods in Fluids

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SUMMARYThere is a need for evolving hydraulically efficient roof profile of bellmouth for high head sluice spillways, as sluice roof is susceptible to cavitation damage. In this paper, formulation and development of a numerical model for simulating the spillway flow and its application to a sluice spillway are presented. The main focus of the simulation study is to apply the developed model to investigate the effects of sluice roof profile geometry on the pressure distribution, the discharge coefficient and the nature of flow regime within the sluice bellmouth. From the analysis of results for eight different roof profiles by varying the entry and exit angles of elliptic bellmouth transition, some important observations have been suggested, which are of practical relevance to hydraulic design engineers. The numerical model results are compared for one profile with physical model study. The simulated results are in close agreement with the measured values.

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Finite Analytic Solution of Flow over spillways

Cited by 21 publications

References 7 publications

Bottom outlet dam flow: physical and numerical modelling

Bottom outlet dam flow: physical and numerical modelling

Hydrodynamic modelling of flow over a spillway using a two-dimensional finite volume-based numerical model

Numerical investigation of the effects of sluice spillway roof profiles on the hydraulic characteristics

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