Boundary shear stress analysis in smooth rectangular channels

2006 ◽  
Vol 33 (3) ◽  
pp. 336-342 ◽  
Author(s):  
Galip Seckin ◽  
Neslihan Seckin ◽  
Recep Yurtal
Keyword(s):  
Shear Stress ◽  
Shear Force ◽  
Open Channel ◽  
Open Channel Flow ◽  
Shear Stresses ◽  
Boundary Shear ◽  
Rectangular Channels ◽  
Boundary Shear Stress ◽  
Bed Shear Stresses ◽  
Total Shear

This study reports on experiments concerning the boundary shear stress and boundary shear force distributions in a smooth rectangular flume. Nonlinear regression-based equations are derived from experimental analysis to give the percentage of the total shear force carried by the walls and mean wall and bed shear stresses around the wetted perimeter as functions of the ratio of channel width to channel depth.Key words: boundary shear, shear force, open channel flow.

Boundary shear stress in open channel flow: A comparison among six methods

2008 ◽  
Vol 46 (5) ◽  
pp. 598-609 ◽  
Author(s):  
Saeed Reza Khodashenas ◽  
Kamal El Kadi Abderrezzak ◽  
André Paquier
Keyword(s):  
Shear Stress ◽  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Boundary Shear ◽  
Boundary Shear Stress

scholarly journals Prediction of Boundary Shear Stress Distribution in Converging Compound Channel Using Gene Expression Programming

2022 ◽  
Author(s):  
Bandita Naik ◽  
Vijay Kaushik ◽  
Munendra Kumar
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Shear Force ◽  
Gene Expression Programming ◽  
Main Channel ◽  
Shear Stress Distribution ◽  
Force Distribution ◽  
Compound Channel ◽  
Boundary Shear ◽  
Boundary Shear Stress

Abstract The computation of the boundary shear stress distribution in an open channel flow is required for a variety of applications, including the flow resistance relationship and the construction of stable channels. The river breaches the main channel and spills across the floodplain during overbank flow conditions on both sides. Due to the momentum shift between the primary channel and adjacent floodplains, the flow structure in such compound channels becomes complicated. This has a profound impact on the shear stress distribution in the floodplain and main channel subsections. In addition, agriculture and development activities have occurred in floodplain parts of a river system. As a consequence, the geometry of the floodplain changes over the length of the flow, resulting in a converging compound channel. Traditional formulas, which rely heavily on empirical approaches, are ineffective in predicting shear force distribution with high precision. As a result, innovative and precise approaches are still in great demand. The boundary shear force carried by floodplains is estimated by gene expression programming (GEP) in this paper. In terms of non-dimensional geometric and flow variables, a novel equation is constructed to forecast boundary shear force distribution. The proposed GEP-based method is found to be best when compared to conventional methods. The findings indicate that the predicted percentage shear force carried by floodplains determined using GEP is in good agreement with the experimental data compared to the conventional formulas (R2 = 0.96 and RMSE = 3.395 for the training data and R2 = 0.95 and RMSE = 4.022 for the testing data).

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