Investigation of Shear Stress Distribution in a 90 Degree Channel Bend
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Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University Ho Chi Minh City, Vietnam 19, Nguyen Huu Tho Str., Tan Phong Ward, Dist. 7, Ho Chi Minh City, Vietnam
VNU-HCM, University of Science 227 Nguyen Van Cu Str., 5 Dist., Ho Chi Minh City, Vietnam
Institute of Coastal and offshore Engineering (ICOE) 658 Vo Van Kiet Boulevard, Dist. 5, HCM City, Vietnam
Online publication date: 2019-03-12
Publication date: 2019-03-01
International Journal of Applied Mechanics and Engineering 2019;24(1):213-220
Shear stress is a key parameter that plays an important role in sediment transport mechanisms; therefore, understanding shear stress distribution in rivers, and especially in river bends, is necessary to predict erosion, deposition mechanisms and lateral channel migration. The aim of this study is to analyze the shear stress distribution near a river bed at 90-degree channel bend using a depth-average method based on experimental measurement data. Bed shear stress distribution is calculated using the depth-averaged method based on velocity components data has been collected from a 3D-ADV device (three-dimensional acoustic doppler velocity) at different locations of a meandering channel. Laboratory experiments have been made at the hydraulic laboratory of the RCRFIDF (Research Center for River Flow Impingement and Debris Flow), Gangneung-Wonju National University, South Korea to provide data for simulating the incipient motion of the riverbed materials and then predicting the river morphological changes in the curved rivers. The calculated results show that the maximum value of shear stress distribution near the riverbed in the different cross sections of the surveyed channel occurs in a 70-degree cross section and occurs near the outer bank. From the beginning of a 40-degree curved channel section, the maximum value of the shear stress occurs near the outer bank at the end of the channel.
Amin A.A., Khan S.M. and Islam A.U. (2013): An experimental study of shear stress distribution in a compound meandering channel. – American Journal of Civil Engineering. Doi: 10.11648/j.ajce.20130101.11.
Ansari K. (2011): Boundary shear stress distribution and flow structures in trapezoidal channels. – Dissertation, University of Nottingham.
Sin K.S, Thornton C.I, Cox A.L. and Abt S.R. (2010): Methodology for Calculating Shear Stress in a Meandering Channel. – Master thesis, Colorado State University.
Schlichting H. (1987): Boundary Layer Theory. – 7th Edition, McGraw-Hill, New York, NY.
Montes S. (1998): Hydraulics of Open Channel Flow. – American Society of Civil Engineers Press, Reston, VA.
Duarte A. (2009): An experimental study on main flow, secondary flow and turbulence in open-channel bends with emphasis on their interaction with the outer-bank geometry. – Laboratory of Hydraulic Constructions.
Vaghefi M., Akbari M. and Fiouz A.R. (2014): Experimental investigation on bed shear stress distribution in a 180 degree. – International Journal of Scientific Engineering and Technology, vol.3, No.7, pp.962-966.
Yang S.Q. (2005): Interactions of boundary shear stress, secondary currents and velocity. – Fluid Dynamics Research, vol.36, No.3, pp.121-136.
Ippen A.T and Drinker P.A. (1962): Boundary shear stresses in curved trapezoidal channels. – ASCE Journal of the Hydraulics Division, vol.88, No.5, pp.143-180.
Heintz M.L. (2002): Investigation of Bend way Weir Spacing. – M.S. Thesis, Colorado State University, Department of Civil Engineering, Fort Collins, CO.
Naji Abhari M., Ghodsian M., Vaghefi M. and Panahpur N. (2010): Experimental and numerical simulation of flow in a 90-degree bend. – Flow Measurement and Instrumentation, vol.21, No.3, pp.292-298.
Baird D.C. (2004): Turbulent and Suspended Sediment Transport in a Mobile, Sand Bed Channel with Riprap Side Slopes. – Dissertation, The University of New Mexico, Albuquerque, NM.
Dang T.A and Park S.D. (2016a): Development and Testing of 2D Finite Difference Model in Open Channels. – Environmental Modeling & Assessment. DOI 10.1007/s10666-016-9520-8.
Dang T.A and Park S.D. (2016b): Experimental analysis and numerical simulation of bed elevation change in mountain rivers. – SpringerPlus. DOI 10.1186/s40064-016-2714-3.
Ackerman J.D. (2001): Measurement of local bed shear stress in streams using a Preston-static tube. – Limnol. Oceanogr., vol.46, No.8, pp.2080-2087.
Tanner L.H. (2001): A comparison of the viscosity balance and Preston tube methods of skin friction measurement. – Journal of Physics E: Scientific Instruments, DOI-10.1088/0022-3735/10/6/017.
Atashi V. and Bejestan M.S. (2012): Shear stress distribution in sharp 90-degree bend with a W-weir. Ecology. – Environment and Conservation, pp.409-414.
Barbhuiya A.K and Talukdar S. (2010): Scour and three-dimensional turbulent flow fields measured by ADV at a 90-degree horizontal forced bend in a rectangular channel. – Flow Measurement and Instrumentation, vol.21, No.3, pp.312-321.
Begin Z.E.B. (1986): Curvature ratio and rate of river bend migration-update. – Journal of Hydraulic Engineering, vol.112, No.10, pp.904-908.
Bhuiyan F., Hey R.D. and Wormleaton P.R. (2009): Effects of vanes and W-weir on sediment transport in meandering channels. – Journal of Hydraulic Engineering, vol.135, No.5, pp.339-349.
Jovein E.B., Ghaneeizad S.M. and Akhtari A.A. (2009): Experimental Study on Flow Structure in Strongly Curved Open Channel 90-degree Bends. – International Symposium on Water Management and Hydraulic Engineering. Paper: A32.
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