Flow in a Channel With a Slot in the Bed

Nasser, Marwan; Venkataraman, P.; Ramamurthy, Amruthur S.

doi:10.1080/00221688009499541

Cited by 15 publications

(8 citation statements)

References 2 publications

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“…In Figure 17, the values of the discharge coefficient along the rack, defined by Equation (1), have been compared with those obtained from Equation (20). For the case of a horizontal slope and a void ratio m = 0.28, the contraction coefficient obtained is CcK ≈ 0.88.…”

Section: Discussionmentioning

confidence: 99%

“…Several authors experimentally verified differences of the pressure field from the hydrostatic conditions in flows along the rack (Mostkow [18]; Venkataraman [19]; Nasser et al [20,21]; Ramamurthy and Satish [22]; Righetti et al [23]). The results of Melik-Nubarow [24], cited by Krochin [3], relate the vertical velocity component in the slit between two bars with the static pressure:…”

Section: Introductionmentioning

confidence: 99%

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Influence of Rack Slope and Approaching Conditions in Bottom Intake Systems

Castillo¹,

García²,

Carrillo³

2017

Water

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Abstract:The study analyzes the flow over bottom racks made of longitudinal T-shaped bars. A clear water flow is considered in a laboratory flume. Free surface profiles, wetted rack lengths, and discharge coefficients are measured, changing parameters such as longitudinal slope, void ratio, and approaching flow. The present work complements existing experimental studies, considering the influence of the approaching flow conditions. The velocity field measured with Particle Image Velocimetry (PIV) technique and the pressure field with Pitot tubes are quantified. Numerical simulations (CFD) are used to complement laboratory data. The energy head along the rack is calculated and compared with the hypothesis of horizontal energy level with minimum energy at the beginning of the rack. A discharge coefficient adjustment that considers the slope, the void ratio, and the position along the rack is proposed and presented with the results of other works. Theoretical proposals to calculate the pressure field along the flow are compared with measurements in the laboratory. The relation between the static pressure head in the space of bars and the discharge coefficient is used as an alternative method to define the discharge.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Rack Slope and Approaching Conditions in Bottom Intake Systems

Castillo¹,

García²,

Carrillo³

2017

Water

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“…Figure 22 also shows the experimental data obtained by Nasser et al [34]. It can be clearly seen from this figure that, on the whole, the numerical model is able to compute the discharge characteristics of the slot quite well.…”

Section: Flow Past a Floor Slotmentioning

confidence: 75%

“…He assumed a hydrostatic pressure distribution and a uniform velocity profile to find expressions for the angle of diverted jet and the ratio of water depths. Nasser et al [34] presented theoretical and experimental results for the values of the coefficient of discharge for the lateral outflow. The ratio of the diverted flow to the main flow as a function of the slot parameters was also presented.…”

Section: Flow Past a Floor Slotmentioning

confidence: 99%

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Numerical study of flows with multiple free surfaces

Mohapatra¹,

Bhallamudi²,

Eswaran³

2001

Numerical Methods in Fluids

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This paper demonstrates that a numerical method based on the generalized simplified marker and cell (GENSMAC) flow solver and Youngs' volume of fluid (Y-VOF) surface-tracking technique is an effective tool for studying the basic mechanics of hydraulic engineering problems with multiple free surfaces and non-hydrostatic pressure distributions. Two-dimensional flow equations in a vertical plane are solved numerically for this purpose. The numerical results are compared with experimental data and earlier numerical results based on a higher-order depth-averaged flow model available in the literature. Two classical problems, (i) flow in a free overfall and (ii) flow past a floor slot, are considered. The numerical results correspond very well with the experimental data for both sub-critical and supercritical flows.

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Viscous Channel Flows

Castro-Orgaz

Hager

2017

Non-Hydrostatic Free Surface Flows

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Flow in a Channel With a Slot in the Bed

Cited by 15 publications

References 2 publications

Influence of Rack Slope and Approaching Conditions in Bottom Intake Systems

Influence of Rack Slope and Approaching Conditions in Bottom Intake Systems

Numerical study of flows with multiple free surfaces

Viscous Channel Flows

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