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Simulation of 2D symmetry and asymmetry wedge water entry by smoothed particle hydrodynamics method

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Abstract

This article presents a study of fluid–solid interaction in a free surface flow by smoothed particles hydrodynamics method. Different cases of symmetry and asymmetry wedge water entries are presented. All cases are performed at constant speed, considering the effect of gravity. First-order density filter, turbulence modeling and a pressure filter have been utilized. Through these compiling options, low-pass pressure filter has been able to eliminate the undesirable fluctuation of pressure, and good results have been achieved. Pressure distribution and free surface profiles have been produced in all cases. In the cases of symmetry wedge water entries, the obtained results were compared against the results of BEM, similarity and asymptotic solutions, but in the cases of asymmetry wedge water entry, the obtained results were compared against those of analytical work. Through these comparisons, it was found that although the general trend of the computed pressure distributions follows the results of the previous studies, there still exist some differences among them. Main difference between the obtained results and other studies is related to the position of the pressure peak. It was concluded that this may indeed be attributed to the nature of the applied methods and due to the methodology of cutting the edges in schemes like BEM to overcome the abrupt flow at the edge. Vertical force in particular symmetry and asymmetry cases was also computed and presented. It was found that the global behavior of the vertical force in both the symmetry and asymmetry wedge water entry is the same and that there are some differences among them in terms of decreasing rate as well as the maximum value of the force.

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Authors and Affiliations

  1. Department of Marine Technology, Amirkabir University of Technology, Hafez Ave, No 424, P.O. Box 15875-4413, Tehran, Iran

    Mohammad Farsi & Parviz Ghadimi

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  1. Mohammad Farsi
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  2. Parviz Ghadimi
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Correspondence to Parviz Ghadimi.

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Communicated by Francisco Ricardo Cunha.

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Farsi, M., Ghadimi, P. Simulation of 2D symmetry and asymmetry wedge water entry by smoothed particle hydrodynamics method. J Braz. Soc. Mech. Sci. Eng. 37, 821–835 (2015). https://doi.org/10.1007/s40430-014-0212-5

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  • DOI: https://doi.org/10.1007/s40430-014-0212-5

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