Discharge Coefficient of Rectangular Side Weirs on Circular Channels
-
Hamed Azimi
,
Isa Ebtehaj
Abstract
In this study, the flow turbulence and variations of the supercritical free surface flow in a circular channel along a side weir are simulated as three dimensional using the RNG k-ε turbulence model and volume of fluid (VOF) scheme. Comparison between the numerical model and experimental measurements shows that the numerical model simulates the free surface flow with good accuracy. According to the numerical model results, the specific energy variations along the side weir for the supercritical flow regime are almost constant and the energy drop is not significant but by increasing the side weir length the energy difference between the side weir upstream and downstream increases. Next, using the nonlinear regression (NLR) and analysis of the simulation results, some relationships for calculating the discharge coefficient of side weir on circular channels in supercritical flow regime are provided.
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©2016 by De Gruyter
Articles in the same Issue
- Frontmatter
- Existence of Solutions of a New Class of Impulsive Initial Value Problems of Singular Nonlinear Fractional Differential Systems
- Lump-Type Solutions to the (3+1)-Dimensional Jimbo-Miwa Equation
- Comparison of Subcritical and Supercritical Flow Patterns Within Triangular Channels Along the Side Weir
- Existence of Solutions for Schrödinger–Kirchhoff Type Problems Involving Nonlocal Elliptic Operators
- Application of Fractional Techniques in the Analysis of Forest Fires
- Discharge Coefficient of Rectangular Side Weirs on Circular Channels
- Backward Bifurcation in a Fractional-Order SIRS Epidemic Model with a Nonlinear Incidence Rate
- Auxiliary Equation Method for Fractional Differential Equations with Modified Riemann–Liouville Derivative
Articles in the same Issue
- Frontmatter
- Existence of Solutions of a New Class of Impulsive Initial Value Problems of Singular Nonlinear Fractional Differential Systems
- Lump-Type Solutions to the (3+1)-Dimensional Jimbo-Miwa Equation
- Comparison of Subcritical and Supercritical Flow Patterns Within Triangular Channels Along the Side Weir
- Existence of Solutions for Schrödinger–Kirchhoff Type Problems Involving Nonlocal Elliptic Operators
- Application of Fractional Techniques in the Analysis of Forest Fires
- Discharge Coefficient of Rectangular Side Weirs on Circular Channels
- Backward Bifurcation in a Fractional-Order SIRS Epidemic Model with a Nonlinear Incidence Rate
- Auxiliary Equation Method for Fractional Differential Equations with Modified Riemann–Liouville Derivative
