Numerical modeling of cavitation on spillway’s flip bucket

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• 作者：Abbas Parsaie ; Sadegh Dehdar-Behbahani…
• 关键词：cavitation Index ; numerical simulation ; spillway’s flip Bucket ; CFD ; Balaroud Dam ; physical modeling
• 刊名：Frontiers of Structural and Civil Engineering
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：10
• 期：4
• 页码：438-444
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Civil Engineering; Cities, Countries, Regions;
• 出版者：Higher Education Press
• ISSN：2095-2449
• 卷排序：10

文摘

Numerical modeling of hydraulic phenomenon by computational fluid dynamic (CFD) approaches is one of the main parts in the high cost hydraulic structure studies. In this paper, using Flow 3D as CFD commercial tool, the cavitation phenomenon was assessed along spillway's flip bucket of the Balaroud dam. Performance of numerical modeling was compared to the physical model, which was constructed to this purpose. During numerical modeling, it was found that RNG turbulence model is a suitable performance for modeling the cavitation. Physical modeling shows that minimum cavitation index is about 0.85 and minimum cavitation index based on Flow 3D results is about 0.665, which was related to the flood discharge with return period of 10000 years. The main difference between numerical and physical modeling is related to the head of velocity, which is considered in physical modeling. Results of numerical simulation show that occurrence of cavitation based on cavitation index equal to 0.25 is not possible along the spillway.