Numerical Simulation of High Speed Water Jet Erosion of Sand Bed Based on SPH

Abstract:

Water jet technology is widely used in dredging engineering. Since there will be large deformation of sand bed during erosion by water jet, the calculation mesh will be distorted seriously and lead to simulation failure. In order to solve the problem, the Smoothed Particle Hydrodynamics (SPH) method was used to simulate the dynamic process of high speed water jet erosion of sand bed. The simulation process and key techniques were discussed, the effect of water jet velocity and water jet target distance on the depth of eroded pit was studied. The results show that SPH could describe the process intuitively and the evolution of particle velocity field and sand bed pressure field could be shown clearly. The depth of the pit varies with time linearly. The decrease of water jet target distance and the increase of the water jet velocity deepen the eroded pit.

• Periodical: Applied Mechanics and Materials (Volumes 641-642)
• Pages: 304-308
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.641-642.304
• Online since: September 2014
• Authors: Fu Sheng Ni, De Yi Zhang, Hui Wang*, Lei Gu
• Keywords: Depth of the Eroded Pit, Numerical Simulation, Smoothed Particle Hydrodynamic (SPH), Water Jet Erosion

References

[1] Liu et al. Journal of Sediment Research. 2001. 3: 40-44.

[2] Huai W X, Wang Z W, Qian Z D, et al. Sci China Tech Sci, 2011, 54: 3265-3274.

[3] MA Lil，TAO Weimin，GUO Yimu et al. Journal of Zhejiang University(Engineering Science). 2008, 42: 259-263(in chinese).

[4] Ha H. B ui, K. Sako, R. Fukagawa. Journal of Terramechanics. 2007, 44 : 339–346.

[5] Aderibigbe O O, Rajaratnam N. Journal of Hydraulic Research, 1996, 34(1): 19–33.

[6] Gordon R. Johnson, Robert A. Stryk, Stephen R. Beissel. Comput. Methods Appl. Mech. Engrg. 1996, 139: 347-373.

[7] Andrea Colagrossi, Maurizio Landrini. Journal of Computational Physics. 2003, 191: 448–475.