Velocity, Discharge and Turbulence Characteristics in a Straight Compound Channel

Kumar, Ashish; Samaiya, Nitin Kumar; F.Ish, U. C. Kothyari

doi:10.1080/09715010.2005.10514804

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Numerous works on straight compound channel flow have been reported using laboratory experiments (Knight and Hamed 1984;Kothyari et al 2003;Kumar et al 2005;Rajaratnam and Ahmadi 1981;Tominaga and Nezu 1991) and numerical simulations (Cater and Williams 2008;Kara et al 2012;Keller and Rodi 1988;Naot et al 1993;Pezzinga 1994;Sofialidis and Prinos 1998;Thomas and Williams 1995) in which flow characteristics and mechanism of lateral momentum transfer from main channel to floodplain have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Development of Two-layered model for compound open-channel flow

Sinha

Das

Patel

et al. 2014

ISH Journal of Hydraulic Engineering

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Present study deals with the development of two-dimensional two-layered model for straight compound open-channel flow using Smagorinsky-based subgrid-scale turbulence model, based on large eddy simulation approach. The two-layer depth averaged governing equations are solved using finite volume method based on MacCormack predictor-corrector explicit scheme. Model results for symmetric and asymmetric straight compound channel flows are verified with the available numerical and experimental data. Variations of flow variables in symmetric and asymmetric straight compound channels in terms of shear stress distributions and spanwise and vertical velocities are analyzed at the horizontal interface between the lower layer and the upper layer. Spanwise and vertical velocities at the horizontal interface revealed the existence of horizontal vortices near the junction of the main channel and the floodplain where momentum exchange takes place. Further, the model result, showing the spanwise shear stresses distribution at the interface of symmetric and asymmetric compound channel, revealed the existence of peak shear stress near the channel junction. Sensitivity of the two important model parameters is also undertaken and their roles in longitudinal velocity distribution along the channel width are discussed.

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Section: Introductionmentioning

confidence: 99%

Development of Two-layered model for compound open-channel flow

Sinha

Das

Patel

et al. 2014

ISH Journal of Hydraulic Engineering

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show abstract

“…As a result, it is necessary to provide an effective method for modeling the velocity distribution. To predict the lateral distributions of the depth-averaged velocity in compound channels, many investigators have proposed several methods, such as the numerical simulation (Krishnappan and Lau 1986), experimental research (Yang et al 2007), and analytical models (Ervine et al 2000;Huai et al 2008;Kumar et al 2005). In engineering practice, analytical models are widely used for simplicity.…”

Section: Introductionmentioning

confidence: 99%

Geometry effect and generalization of velocity distribution in asymmetric compound channels

Al‐Khatib

Göğüş

2014

ISH Journal of Hydraulic Engineering

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Nine different geometries with asymmetric rectangular compound cross-sections were tested in a laboratory flume in order to investigate effects of the geometry on the values of three different dimensionless velocity ratios. A generalized single variable regression model has been derived to predict each of the three dimensionless velocity ratios with high accuracy. Another set of the multiple-variable regression models has been derived using one additional dimensionless parameter which is the ratio of the upstream channel width to the main channel width. The application of several key statistics and validation procedures has indicated that the developed models predict the three mean dimensionless velocity ratios with high correlation coefficients.

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Flow characteristics in compound channels with skewed and inclined floodplains

Dolatimahtaj,

Rezaei

2024

ISH Journal of Hydraulic Engineering

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Velocity, Discharge and Turbulence Characteristics in a Straight Compound Channel

Cited by 3 publications

References 12 publications

Development of Two-layered model for compound open-channel flow

Development of Two-layered model for compound open-channel flow

Geometry effect and generalization of velocity distribution in asymmetric compound channels

Flow characteristics in compound channels with skewed and inclined floodplains

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