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Numerical simulations of impact flows with incompressible smoothed particle hydrodynamics

Abstract

A 2D incompressible smoothed particle hydrodynamics (SPH) method is implemented to simulate the impact flows associated with complex free surface. In the incompressible SPH framework, pressure Poisson equation (PPE) based on the projection method is solved using a semi-implicit scheme to evaluate the correct pressure distribution. In this procedure, the PPE comprises the divergence-free velocity condition and density-invariance condition with a relaxation parameter. To test the accuracy and efficiency of the proposed incompressible SPH method, it was applied to several sample problems with largely distorted free surface, including 2D dam-break over horizontal and inclined planes with different inclination angles, as well as the water entry of a circular cylinder into a tank. We mainly focused on the time history of impact pressure on various positions of the solid boundary and temporal evolution of free surface profiles. The results showed reasonably good agreement with experimental data. However, further improvement is needed for extremely high impact flow.

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Correspondence to Sang-Wook Lee.

Additional information

Recommended by Associate Editor Gihun Son

A. M. Aly received his Ph.D. in Civil Engineering from Kyushu University, Japan in 2012. Currently, he is an Assistant Professor of the Department of Mathematics at South Valley University, Egypt. His research interests include computational fluid dynamics and heat transfer.

S.-W. Lee received his Ph.D. in Mechanical Engineering from the University of Illinois at Chicago in 2005. Currently, he is an Associate Professor of the School of Mechanical Engineering at the University of Ulsan. His research interests include cardiovascular mechanics and computational fluid dynamics.

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Aly, A.M., Lee, SW. Numerical simulations of impact flows with incompressible smoothed particle hydrodynamics. J Mech Sci Technol 28, 2179–2188 (2014). https://doi.org/10.1007/s12206-014-0120-8

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Keywords

  • Incompressible SPH
  • Free surface flow
  • Dam-break flow
  • Inclined plane
  • Water entry
  • Circular cylinder