TY - JOUR ID - 4582 TI - Numerical modeling of flood waves in a bumpy channel with different boundary conditions JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Farmani, S. AU - Barani, Gh. AU - Ghaeini-Hessaroeyeh, M. AU - Memarzadeh, R. AD - Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, P.O. Box 76169-133, Iran Y1 - 2019 PY - 2019 VL - 26 IS - 2 SP - 667 EP - 677 KW - Flood waves KW - ISPH method KW - Wave breaking KW - Uneven bed KW - Fractional method DO - 10.24200/sci.2017.4582 N2 - In this paper, the Incompressible Smoothed Particle Hydrodynamics (ISPH) method is presented to simulate flood waves in uneven beds. The SPH method is a mesh free particle modeling approach that is capable of tracking the large deformation of free surfaces in an easy and accurate manner. Wave breaking is one of the phenomena that its free surface is complicated. Therefore, ISPH method is robust tool for the modeling of this kind of free surface. The basic equations are the incompressible mass conservation and Navier–Stokes equations that are solved using a two-step fractional method. In the first step, these equations are solved to compute velocity components by omitting the pressure term and in the absence of incompressible condition. In the second step, the continuity constraint is satisfied and the Poisson equation is solved to calculate pressure terms. In the present model, a new technique is applied to allocate density of the particles for the calculations. By employing this technique, ISPH method is stabled. The validation by comparison with laboratory data is conducted for bumpy channel with various boundary conditions. The numerical results showed good agreement with available experimental data. Also relative error is calculated for two numerical cases. UR - https://scientiairanica.sharif.edu/article_4582.html L1 - https://scientiairanica.sharif.edu/article_4582_118a60cbc4506f31576d86043eaacf7e.pdf ER -