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Application of Compressible SPH Method for Simulation of Impulsive Waves

Mansour Rezaei Fumani, Saheb | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39129 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Ataei Ashtialni, Behzad
  7. Abstract:
  8. Impulsive waves generated by landslides and slamming on horizontal cylindrical members of a jacket are examples of phenomena which cause damage on structures and endanger human life. Importance of wave generated by land slide was a motivation for a large number of analytical, experimental and numerical studies. Recently, numerical methods that do not use a grid have been used in order simulation and prediction of damage in these sophisticated hydrodynamic problems. One of these modern methods is Smoothed Particle Hydrodynamics (SPH). A general model based on Smoothed Particle Hydrodynamics, “SPHysics”, was developed jointly by researchers to promote the development and use of SPH within the academic and industrial communities. Laboratory investigations had been performed on the submarine landslide generated waves at Sharif University of Technology. In this work, Compressible Smooth Particles Hydrodynamics (C-SPH) is applied for numerical simulation of impulsive wave. Also, Properties of linear and angular momentum in SPH formulation are studied. Kernel gradient of viscous term in momentum equation is corrected to ensure preservation of angular momentum. Corrected SPH method is used to simulate solitary Scott Russell wave and applied to simulate impulsive wave generated by two-dimensional under water landslide. In each of test cases, results of corrected SPH are compared with experimental results. The results of the numerical simulations and experimental works are matched and a satisfactory agreement is observed. Furthermore, vorticity counters computed by the corrected SPH are compared with uncorrected SPH so that the effect of preservation of angular momentum is illustrated. Comparison between experimental and computational results proves applicability of The C-SPH method for simulation of these kinds of problems
  9. Keywords:
  10. Smoothed Particle Hydrodynamics (SPH) ; Shock Wave ; Viscosity ; Angular Momentum

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