Effect Of Roughness on Velocity Distribution in Open-Channel Flow
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Date
2023
Authors
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Publisher
Université Mouloud Mammeri
Abstract
This research aims to investigate the impact of surface roughness on turbulent free-surface flows, with a specific focus on the "dip phenomenon" where the maximum velocity is below the free surface. After reviewing fundamental concepts and previous studies, velocity profiles for both smooth and rough beds are generated using analytical expressions from the literature. These computed profiles are then extensively compared to experimental data extracted from a significant study by Tachie et al. (2004). The analysis demonstrates a close agreement between the calculated velocity distributions and measured data, even for rough beds. These findings reaffirm the reliability of analytical models in predicting flows over rough surfaces, contributing new evidence to support this. The knowledge gained from this research helps bridge the gap between mathematical representations and the physical reality of turbulent flows over rough surfaces.
Description
53 f. : ill. ; 30 cm. (+ Cd-Rom)
Keywords
Roughness, Free-surface flow
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