Study of Hydraulic Characteristics in an Open Channel Flow with Vegetation

Abstract

Experiments have been conducted in an open channel with rigid vegetation for unsubmerged and submerged flows. Cylindrical rods are used to represent the rigid vegetation. The results show that as flow depth changes the roughness constant also changes. The variation of vertical velocity profiles, depth averaged velocity with the flow depth has also been discussed. The flow resistance though the channel is best expressed with depth averaged velocity. Vertical profiles of point velocity for a vegetative channel from position to position are different as compared to that of a simple channel. The velocity profile patterns are investigated. The numerical method is applied to calculate velocity profiles in an open channel with vegetation. The results of numerical simulation are compared with the experimental data and numerical results are little over estimating than experimental. In this thesis, a computational fluid dynamics CFD model ANSYS FLUENT is used to simulate for a vegetated open channel flow. The simulation of channel is done by taking k-epsilon model and volume of fluid VOF