Water entry of decelerating spheres simulations using improved ISPH method

Abdelraheem M. Aly, Mitsuteru Asai

研究成果: Contribution to journalArticle査読

13 被引用数 (Scopus)

抄録

In this paper, we simulated the vertical impact of spheres on a water surface using three-dimensional incompressible smoothed particle hydrodynamics (3-D ISPH) method. The sphere motion is taken to be a rigid body motion and it is modeled by ISPH method. The governing equations are discretized and solved numerically using ISPH method. A stabilized incompressible SPH method by relaxing the density invariance condition is adopted. Here, we computed the motions of a rigid body by direct integration of the fluid pressure at the position of each particle on the body surface. The equations of translational and rotational motions were integrated in time domain to update the position of the rigid body at each time step. In this study, we improved the boundary treatment between fluid and fixed solid boundary by using virtual marker technique. In addition, an improved algorithm based on the virtual marker technique for the boundary particles is proposed to treat the moving boundary of the rigid body motion. The force exerted on the moving rigid boundary particles by the surrounding particles, is calculated by the SPH approximation at the virtual marker points. The applicability and efficiency of the current ISPH method are tested by comparison with reference experimental results.

本文言語英語
ページ(範囲)1120-1133
ページ数14
ジャーナルJournal of Hydrodynamics
30
6
DOI
出版ステータス出版済み - 12 1 2018

All Science Journal Classification (ASJC) codes

  • モデリングとシミュレーション
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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