ENHANCED PREDICTIONS OF WAVE IMPACT PRESSURE BY IMPROVED INCOMPRESSIBLE SPH METHODS

By Abbas Khayyer, Hitoshi Gotoh, Songdong Shao. 2009

181 citations recorded by the source corpus.

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.

Subfields: Computational Mechanics

View Paper: https://www.semanticscholar.org/paper/51c4b1d44aa1ce83bc4b3499b90ea8f047ff180c

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In Computational Mechanics

1. Abbas Khayyer
2. Hitoshi Gotoh
3. Yan Zhou
4. S. Yan
5. Q. Ma
6. Benedict D. Rogers
7. Damien Violeau
8. Songdong Shao

Citations in the corpus

• Smoothed particle hydrodynamics (SPH) for free-surface flows: past, present and future (2016, methodology): “Early efforts to employ the variable particle resolutions in SPH were made by Kitsionas and Whitworth (2002), and later strengthened using a variationally-derived formulation by Feldman and Bonet (2007).”
• Enhancement of stability and accuracy of the moving particle semi-implicit method (2011, background): “The first step in elimination of tensile instability is to minimize the particle perturbations by suppressing the unphysical pressure oscillations [1,25,35,36,39,41,44,53] and obtain a smooth and accurate pressure calculation.”
• Current achievements and future perspectives for projection-based particle methods with applications in ocean engineering (2016, background): “However, there have been substantial efforts and progresses corresponding to this distinct shortcoming (e.g. Ataie-Ashtiani et al. 2008; Khayyer et al. 2009; Koshizuka 2011; Gotoh et al. 2014).”
• A review on approaches to solving Poisson’s equation in projection-based meshless methods for modelling strongly nonlinear water waves (2016, background): “Khayyer et al. (2009) replaced the source term by a higher-order source term, while Kondo and Koshizuka (2011), Khayyer and Gotoh (2011), Khayyer and Gotoh (2013), Gotoh and Khayyer (2016) and Gotoh et al. (2014) introduced an error-compensating term (including a highorder main term and two…”