Numerical Simulation of Floating of Objects with by pressure field correction of SPH Method

Document Type : Original Article

Authors

1 Master's degree, Malik Ashtar University of Technology, Tehran, Iran

2 Assistant Professor, Malik Ashtar University of Technology, Tehran, Iran

3 Professor, Malik Ashtar University of Technology, Shahin Shahr, Iran

Abstract

In this paper, the Smoothed Particle Hydrodynamics (SPH) method with dynamic boundary condition has been used to simulate 2D floating of objects. Severe fluctuations in the field of pressure and velocity is one of the major problems in this method. In this paper, the fluctuations have been corrected using Delta and Shift algorithms. The simulation was numerically performed with three viscosity models including real fluid viscosity (laminar and turbulence), ideal fluid (without viscosity) and artificial viscosity. Validation of this method indicated that in the case of artificial viscosity and also ideal fluid, the Delta algorithm should be used and in the case of real fluid viscosity, using Delta and Shift algorithms could establish good agreement with experimental data. Finally, by simulating the floating experiment with the obtained optimal numerical models, the results showed that the optimal method in the case of real fluid viscosity had a better performance in modeling the horizontal, vertical and rotational movements of the floating body than other optimal methods.

Keywords

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References

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History

  • Receive Date: 25 June 2022
  • Revise Date: 29 November 2022
  • Accept Date: 19 February 2023
  • Publish Date: 02 March 2023

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