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ISPH-CGDEM을 활용한 제트류에 의한 3차원 세굴 수치해석
김지환(Jihwan Kim),신동빈(Dongbin Shin),변제윤(Jeyun Byun),주영석(Young Seok Joo) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Scour by jet flow is one of the common characteristics between fluid and solid particles in many study fields such as mechanical, civil, and environmental engineering, etc. In this study, Incompressible Smoothed Particle Hydrodynamics (ISPH) was employed to simulate fluid motions and overcome the weaknesses of WCSPH (Weakly-Compressible Smoothed Particles Hydrodynamics). Coarse-grained Discrete Element Method (CGDEM) was used to simulate soil particles and reduce computational time using larger particle sizes for the simulations than the experiments. The interaction between fluid and solid particles was computed with the fluid porosity. The simulation result was reasonably validated with the experiment results in terms of scour depth and length in time. Furthermore, the CGDEM showed a significant reduction in computational time cost. Thus, the developed model improved the applicability of large-scale simulations.