An Improved Dynamic Boundary Condition in SPH Method

被引：3

作者：

Li, Xu ^{[1
]}

Zhang, Haiwen ^{[2
]}

Yuan, Dekui ^{[1
]}

机构：

[1] Tianjin Univ, Dept Mech, Tianjin 300350, Peoples R China

[2] China Inst Water Resources & Hydropower Res, Beijing 100038, Peoples R China

来源：

MECHANIKA | 2021年 / 27卷 / 06期

关键词：

dynamic boundary condition; DBC; SPH; SMOOTHED PARTICLE HYDRODYNAMICS; DUALSPHYSICS; SOLVER; WAVES;

D O I：

10.5755/j02.mech.28674

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Dynamic boundary condition (DBC) has been widely used in SPH method. However, in certain situations, it was found that a few fluid particles could break through the boundary or were not reflected specularly. Of course, these phenomena are unphysical. To improve the performance of DBC, an improved dynamic boundary condition (IDBC) was presented in this paper. To prevent fluid particles from breaking through the boundary, the repulsive force of boundary particles was enhanced by expanding the equation of state into a higher order. To deal with the asymmetry of DBC, a rectangular support domain attached to boundary particles and a corresponding correction factor are proposed. The results of three test cases showed that the performance of IDBC was satisfied.

引用

页码：465 / 474

页数：10

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