Simulation of Subcritical Flow Distribution and Water Surface Fluctuations in Four-branch Open Channel Junction with FLOW 3D

Document Type : Original Article

Authors

1 Department of Soil and Water,Faculty of Agriculture,Shahrood University of Technology, Shahrood, Iran

2 Department of Soil and Water , Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran

3 Assistant Professor, Department of Water & Soil, Faculty of Agricultural Engineering, Shahrood University of Technology

Abstract

In this study, flow characteristics in 90 degree four-branch open channel junction with two inlets and two outlets simulated using FLOW 3D. Effect of parameters such as ratio of lateral to main inlet discharge, height of weirs on ratio of main outlet discharge to inlet discharge and water surface profile in junction were investigated and were compared with experimental results. Compression of experimental and numerical results showed good agreement, in simulation outlet discharge, so that RMSE and NRMSE in main outlet channel obtained 0.00047 m3/s and %3.357, in lateral outlet channel obtained 0.00488 m3/s and %4.834, respectively. For a constant discharge ratio, a decrease in height of outlet weirs, led to higher Froude number. Also comparison of experimental and numerical results for water surface profile showed good agreement, Too. In a constant height of weirs, when flow approaching the junction water surface profile decreased, and as crossing the junction, water surface profile showed increasing trendency, so that RMSE and NRMSE for water surface profile in main channel were obtained 0.036884 m and %15.75 and in lateral channel obtained 0.04891 m and 1.996%, respectively. An increase in inlet discharge ratio led to more water surface fluctuation in junction whereas height of weir decreased water surface fluctuations

Keywords

References

جوادی، ع.، مصطفی‌زاده فرد، ب.، شایان نژاد، م. و صدقی، م. ر. 1396. ارزیابی معادلات نفوذ آب به خاک در شرایط تلفیق کیفیت آب آبیاری، رطوبت اولیه خاک و بار آبی ثابت. نشریه پژوهش آب در کشاورزی، 31، 3: 469-482.
حسینی، س. ح. 1393. بررسی آزمایشگاهی و تحلیلی مشخصات جریان زیربحرانی در تقاطع چهار شاخه‌ی کانال­های روباز. رساله دکتری، دانشکده کشاورزی، دانشگاه تبریز.
حسینی، س. ح. ، فرسادیزاده ، د.، حسین­زاده دلیر، ع. و سلماسی، ف. 1394. مدل تحلیلی یک‌بعدی توزیع جریان زیربحرانی در تقاطع چهار شاخه کانال­های روباز. نشریه دانش آب ‌و خاک، 25، 1: 235- 246.
سعادتی، ا. و زین­العابدینی، م. 1394. اصول شبیه­سازی مقدماتی و پیشرفته دینامیک سیالات محاسباتی با استفاده از نرم‌افزارهای FLUENT و CFX. به سفارش شرکت مهندسی پرداد پترو دانش، تهران.
گوهری، س. 1391. بررسی عددی و آزمایشگاهی الگوی جریان در تقاطع 90 درجه کانال­های مستطیلی. پژوهش­های حفاظت آب و خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، 19. 4: 121-138.
Bannaya, M. and Hoogenboom, G. 2009. Using pattern recognition for estimation cultivar coefficients of a crop simulation model, Journal of Field Crops Research.111.3: 290-302.
Biswal,S. K., Mohapartra, P. and Muralidhar,K. 2016. Hydraulics of combining flow in a right-angled compound open channel junction, Journal of Sadhana, 41.1: 97-110.
Creëlle, S.,Engelen, L.,Schindfessel, L., Ramos, P., X. and Mulder, T. D. 2018. Experimental investigation of free surface gradients in a 90° angled asymmetrical open channel confluence, Journal ofAdvances in Hydro informatics,Springer Water. Springer, Singapore.
Frizzell, C. S., Khan, A. A. and Werth, D. E. 2008. Numerical simulation of equal and opposing subcritical flow junctions, Journal of Hydrologic Engineering, ASCE. 134.2: 267–273.
Jamieson, P. D., Porter, D. R and Wilson, D. R. 1991. A test of the computer simulation model ARCWHEATI on wheat crops grown in New Zealand, Journal of Field Crops Research.27.4: 337-350.
Luo, H.,Fytanidis, K. D., Schmidt, A. R. and Garcıa, M. H. 2018. Comparative1Dand3D numerical investigationofopen-channeljunctionflowsandenergylosses,Advances in Water Resources, 117.7: 120-139.
Mignot, E., Rivière, N.,Paquier, A. and Perkins, R. J. 2012. Hydraulic Models of the Flow Distribution in a Four Branch Open Channel Junction with Supercritical Flow, Journal of Hydraulic Engineering. 137.3: 289-299.
Nania, L. S., Gonzalo, R. and Gomez, M. 2014. Influence of channel width on flow distribution in four-branch junctions with supercritical flow: experimental approach.Journal of Hydrologic Engineering, ASCE. 140.1: 77-88.
Pirzadeh, B. and Shamloo, H. 2007. Numerical investigation of Velocity Field in Dividing Open-Channel Flow, Proceedings of the 12th WSEAS International Conference on Applied Mathematics,Cairo, Egypt, pp: 194-198.
Ramamurthy, A. S., Juying, Qu. and Chao, Zh. 2006. 3D simulation of combining flows in rectangular closed conduits,Journal of Hydrologic Engineering, ASCE. 132.2: 214-216.
Riviere, N., Travin, Gand Perkins, R. J. 2011. Subcritical open channel flows in four branch intersections, Journal of Water Resources Research. 47.10: 1-10.
Shettar, A. S and Murthy, K. K. 1996.A numerical study of division flow in open channels, Journal of Water Resources Research. 34.5: 651-675.
Shumate, E. D. 1998. Experimental description of flow at an open channel junction,Master thesis, University of Iowa, Iowa.
Huang, j., Weber, L. and Lia, Y. 2002. Three-dimensional numerical study of flows in open-Channel junctions,Journal of Hydrologic Engineering, ASCE. 128.3: 268-280.
Iranian Journal of Irrigation & Drainage
Volume 14, Issue 3 - Serial Number 81
July and August 2020
Pages 1018-1031

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