Numerical Modeling of Dambreak, Flow over Sharp Crested Weir and Simultaneous Operation of Gate and

Document Type : Research Article


1 Ph.D. Student, Department of Civil and Environmental Engineering, Shiraz University, Iran

2 Professor, Department of Civil and Environmental Engineering, Shiraz University, Iran

3 Assistant Professor, Department of Water Engineering, Shiraz University, Iran

4 Assistant Professor, Department of Mechanical Engineering, Shiraz University of Technology, Iran


Smoothed Particle Hydrodynamic (SPH), a new generation of mesh-free numerical methods to model free surface flow, is of great interest among many researchers nowadays. In this paper, ISPH was applied to simulate free-surface flow around hydraulic structures in several classical cases including dambreak, flow over a sharp-crested weir, and simultaneous operation of weir and gate. Due to enforcing incompressibility of flow, Cummins and Rudmans (1999) projection method is used in these cases. Error curves are used to evaluate the sensitivity of ISPH to approximate pressure terms. Two pressure formulations for approximating the left-hand-side of the Poisson equation result in a similar and acceptable trend of error. Comparison of several classical flow cases results using ISPH with experimental data and FVM-VOF shows good agreement between them.


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