Journals / Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi / 2007 / Cilt: 22 - Sayı: 1

Numerical and experimental analyses of open channel flows behind control structures

Kontrol yapıları arkasındaki açık kanal akımlarının sayısal ve deneysel analizi

Pages
245–253
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The free surface profiles on the weir modeled in a laboratory channel are theoretically obtained with the volume of fluid (VOF) analysis and compared with the experimental free surfaces.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Because the governing equations of the fluid motion contain the terms of viscosity and turbulence, it is generally difficult to obtain the analytical solutions of these equations except the flow problems that have simple geometric boundaries.
📊
Key Findings & Data:Different numerical methods are used to obtain approximate solutions of such problems.
💡
Conclusion & Impact:The free surface profiles on the weir modeled in a laboratory channel are theoretically obtained with the volume of fluid (VOF) analysis and compared with the experimental free surfaces.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Because the governing equations of the fluid motion contain the terms of viscosity and turbulence, it is generally difficult to obtain the analytical solutions of these equations except the flow problems that have simple geometric boundaries. Different numerical methods are used to obtain approximate solutions of such problems. In this study, velocity measurements for a flow of triangular broad-crested weir are taken using PIV in a laboratory channel. Using the finite element method, the numerical solutions for the Reynolds transport equations are obtain to compare with experimental velocities. The free surface profiles on the weir modeled in a laboratory channel are theoretically obtained with the volume of fluid (VOF) analysis and compared with the experimental free surfaces.

Özet

Suyun hareketini idare eden denklemlerin analitik çözümlerini elde etmek, bu denklemlerin viskozite ve türbülans ifadeleri içermesinden dolayı bazı basit ve sınırları geometrik olan akım problemleri dışında oldukça zordur. Bu tür problemlerin çözümünde çeşitli sayısal yöntemler kullanılarak yaklaşık çözümler elde edilmektedir. Bu çalışmada laboratuvar kanalında gerçekleştirilen iki boyutlu savak arkası akımda PIV cihazı kullanılarak hız ölçümleri yapılmıştır. Elde edilen deneysel bulgular, sonlu elemanlar yöntemi kullanılarak Reynolds hareket denkleminin sayısal çözümünden elde edilen teorik hızlarla karşılaştırılmıştır. Savak üzerinde oluşan su yüzü profili, akışkan hacim yöntemi (VOF) ile teorik olarak elde edilen su yüzü profili ile karşılaştırılmıştır.

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Cite This Article

AKÖZ, M., ŞEKER, T., DEMİRCİ, M. (2007). Numerical and experimental analyses of open channel flows behind control structures. Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi, Cilt: 22 - Sayı: 1, 245–253. https://ajindex.com/articles/350393

References (10)

  1. Aköz,M.S., “Potansiyel Akımların Teorik ve Deneysel Analizi”, Yüksek Lisans Tezi, Çukurova Üniversitesi”, 1996
  2. Wen,X., Ingham,D.B., Widodo,B., “The Free Surface Fluid Flow Over a Step of an Arbitrary Shape in a Channel”, Engineering Analyses With Boundary Elements 19: 299-308, 1997
  3. Montes,J.S., “Irrotational Flow And Real Fluid Effects Under Planar Sluice Gates. Journal Of Hydraulic Engineering”, 219, 1997
  4. Roth,A, Hager,W.H., “Underflow of Sluice Gate”, Experiments in Fluids”, Springer-Verlag, 27, 339–350, 1999
  5. Ghodsian,M., Asce,M., “Flow Through Side Sluice Gate”, Journal of Irrigation and Drainage Engineering, 2003
  6. Chatila,J., Tabbara,M., “Computational Modeling of Flow Over an Ogee Spilway” Computers and Structures, 82, 1805-1812, 2004
  7. Ashgriz,N., Barbat,T., Wang,G., “A Computational Lagrangian-Eularian Advection Remap For Free Surface Flows”, International Journal For Numerical Methods In Fluids, 44:1-32, 2004
  8. Salem,S.A., “Numerical Simulations For The Contraction Flow Using Grid Generation”, Math. and Computing, 16, 2004
  9. Launder,B.E. and Spalding,D.B., “The numerical computation of turbulent flows”, Computer Methods in Applied Mechanics and Engineering, 3: 269-289, 1974
  10. Hirt,C.W. and Nichols,B.D., “Volume of fluid (VOF) method for the dynamics of free boundaries”, Journal of Computational Physics, 39:201-225, 1981.