Studying the Flow Passes a Pier with an Upstream Vane in Open Channel Flow
DOI:
https://doi.org/10.37934/cfdl.17.8.156170Keywords:
Open channel flow, pier, vaneAbstract
The interaction between the hydrodynamic field around the pier and the hydrodynamic field around the vane represents a challenge to the hydraulic designers owing to the high risk that must be considered, especially the alteration in flow velocity and pressure distribution. The problem statement, reveal how the vane redistributes the local pressures around pier under varied vane length moreover we seek about how the variation in the values of Reynolds number has significant impact on the distribution of local pressures. The paper focuses on the numerical simulation of the hydrodynamic field between the vane and the circular pier in two dimensions for steady, incompressible and laminar water flow over a fixed and horizontal bed by using ANSYS Fluent software. The simulation relies on different Reynolds numbers and different vanes lengths. The length and thickness of the vane are described as a function of the pier diameter, while the distance between the vane and the pier has been taken to be equal to the pier diameter. The hydrodynamic field is defined by local static pressure, local dynamic pressure and pressure coefficient. These variables are studied numerically around the pier circumference by depending on an angle measured from the pier centre to any point on the pier circumference. It is found that the variation in these variables with angle based on pressure distribution, velocity distribution, flow separation and flow dissipation, as well as the vane length, has a vital role in determining the hydraulic behaviour of the hydraulic system. The purpose of the paper concentrates on how the vane alter the hydrodynamic features around the pier.
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