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Simulation of a lateral sluice with sediment in Ansys Fluent

The sluice is one of the most important sections in all natural and artificial water transmission channels. These sluices (lateral sluice) can transfer some water into the channel to another location or add some water to the channel. Sediments also play an important role in the canals. These sediments are designed to collect particles suspended in water channels, either naturally or artificially.

In this analysis, an attempt has been made to simulate and analyze of a lateral sluice with sediment using Ansys Fluent software.

Geometry and Mesh

The geometry used in this project consists of a direct channel with a lateral sluice, which is produced by Gambit software. Meshing is also produced by the same software. The mesh type is unstructured. The geometric shape of this cells is triangular and the number of cells produced is 807646.

Model

This analysis is done in two-dimensional mode and the phase shift resulting from the interaction of two fluid has been analyzed. To analyze this phase change, the two-phase VoF Model has been used. In this analysis, the Eulerian equation has been used for two phases.

To analyze the motion of the fluid, the K-epsilon Turbulent Model is used in RNG mode. For modeling the sedimentation, the Discrete Phase Model has been used as DPM Interaction Internal and suspended particles are modeled in the form of injections in the main fluid. It should be noted that in such cases the impact of gravity must also be considered.

Boundary Condition

In this analysis, the flow inlet is considered as Velocity-Inlet for water, and its rate is 0.3145 m/s. Particle collisions are considered as Escape Model. The outlet is divided into two parts. The first part related to the outflow of water from, and it is set to OutFlow at a weight rate of 0.726  and for the second part, it is equal to 0.274.

The side walls and the bottom of this domain are also considered as Wall condition. The reaction of these walls is considered as Reflect Mode in collision with particles.

Discretization of equation

For the solution of this flow, the Phase Coupled SIMPLE algorithm has been used. The First Order Upwind method has been used to discretize the equations.

The results are presented as pressure, velocity and phase contours.

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