Enhanced predictions of wave impact pressure by improved incompressible SPH methods |
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| Authors: | Abbas Khayyer Hitoshi Gotoh Songdong Shao |
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| Institution: | aDepartment of Urban and Environmental Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto 615-8540, Japan;bSchool of Engineering, Design and Technology, University of Bradford, West Yorkshire, BD7 1DP, United Kingdom |
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| Abstract: | A new criterion is proposed for a more efficient assessment of free-surface particles in a particle-based simulation. Enhanced wave impact simulations are carried out by improved Incompressible SPH (ISPH) methods. The first improvement is the same as that in the Corrected ISPH (CISPH; Khayyer A, Gotoh, H, Shao SD. Corrected incompressible SPH method for accurate water-surface tracking in breaking waves, Coast Eng 2008; 55 (3): 236–250]) method and is proposed for the improvement of momentum conservation. The second improvement is achieved by deriving and employing a higher order source term based on a more accurate differentiation to obtain a less fluctuating and more accurate pressure field. The enhanced performance of improved ISPH methods is demonstrated through the simulation of several fluid impact simulations in comparison with the experimental data and simulation results by other numerical methods. |
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| Keywords: | SPH method Improved incompressible SPH methods Particle method Wave impact pressure |
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