A 2D NUMERICAL DEPTH-AVERAGED MODEL FOR UNSTEADY FLOW IN OPEN CHANNEL BENDS

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AHMADI M.M.; AYOUBZADEH SEYED ALI; MONTAZERI NAMIN M.; SAMANI J.M.V.

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Paper Information

Journal: JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST) Year:2009 | Volume:11 | Issue:4 Page(s): 457-468

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Title

A 2D NUMERICAL DEPTH-AVERAGED MODEL FOR UNSTEADY FLOW IN OPEN CHANNEL BENDS

Author(s)

AHMADI M.M. | AYOUBZADEH SEYED ALI | MONTAZERI NAMIN M. | SAMANI J.M.V. | Issue Writer Certificate

Keywords

BEND

MEANDER

NUMERICAL MODELS

OPEN CHANNELS

TWO DIMENSIONAL MODEL

UNSTEADY FLOW

Abstract

The purpose of this paper is to present a 2D depth-averaged model for simulating and examining UNSTEADY FLOW patterns in open channel BENDs. In particular, this paper proposes a 2D depth-averaged model that takes into account the influence of the secondary flow phenomenon through calculation of the dispersion stresses. The dispersion terms which arose from the integration of the product of the discrepancy between the mean and the actual vertical velocity distribution were included in the momentum equations in order to take into account the effect of the secondary current. This model used a time-splitting method for solving advection, diffusion and other momentum equation terms. The proposed model uses an orthogonal curvilinear coordinate system efficiently and accurately to simulate the flow field with irregular boundaries; it also used a finite volume projection method approach for solving the governing equation in a staggered grid. Two sets of experimental data were used to demonstrate the model's capabilities. The comparison of the simulated water surface elevation with the measurements shows good agreement and indicates that inclusion of the dispersion terms improved the simulation results.

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APA: Copy

AHMADI, M.M., AYOUBZADEH, SEYED ALI, MONTAZERI NAMIN, M., & SAMANI, J.M.V.. (2009). A 2D NUMERICAL DEPTH-AVERAGED MODEL FOR UNSTEADY FLOW IN OPEN CHANNEL BENDS. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), 11(4), 457-468. SID. https://sid.ir/paper/577076/en

Vancouver: Copy

AHMADI M.M., AYOUBZADEH SEYED ALI, MONTAZERI NAMIN M., SAMANI J.M.V.. A 2D NUMERICAL DEPTH-AVERAGED MODEL FOR UNSTEADY FLOW IN OPEN CHANNEL BENDS. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST)[Internet]. 2009;11(4):457-468. Available from: https://sid.ir/paper/577076/en

IEEE: Copy

M.M. AHMADI, SEYED ALI AYOUBZADEH, M. MONTAZERI NAMIN, and J.M.V. SAMANI, “A 2D NUMERICAL DEPTH-AVERAGED MODEL FOR UNSTEADY FLOW IN OPEN CHANNEL BENDS,” JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), vol. 11, no. 4, pp. 457–468, 2009, [Online]. Available: https://sid.ir/paper/577076/en

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