CAJ | 학술논문

边界排斥力模型是SPH算法中固壁边界施加的方法之一，可以有效地防止粒子穿透边界，并且适用于处理复杂的边界问题。文章以Lennard-Jones和法向排斥力两种经典模型，模拟了二维溃坝，并在传统的法向排斥力模型基础上，增加了修正项，用以防止在计算时出现奇点导致运算崩溃。通过分析两种排斥力模型得到的流体粒子速度矢量，以及与相关文献、试验数据进行对比可知，前者对临近边界的流体粒子有较大的扰动，导致粒子运动紊乱、流动受阻，后者则更适用于SPH的计算。
변계배척력모형시SPH산법중고벽변계시가적방법지일，가이유효지방지입자천투변계，병차괄용우처리복잡적변계문제。문장이Lennard-Jones화법향배척력량충경전모형，모의료이유궤패，병재전통적법향배척력모형기출상，증가료수정항，용이방지재계산시출현기점도치운산붕궤。통과분석량충배척력모형득도적류체입자속도시량，이급여상관문헌、시험수거진행대비가지，전자대림근변계적류체입자유교대적우동，도치입자운동문란、류동수조，후자칙경괄용우SPH적계산。
Boundary repulsive model is one of the methods for rigid boundary treatment in smoothed parti-cle hydrodynamics (SPH) algorithm, which can effectively prevent particles from penetration, and is suit-able for dealing with complicated boundary issues. In this paper, two classical models Lennard-Jones and normal repulsive model are used to simulate the two-dimensional dam break, and a correction term is added to the normal repulsive model to prevent singularity occur in the calculation resulting compute crash. By anal-ysis of the fluid particle velocity vector of the two boundary model, and comparing with the experimental da-ta shows that the Lennard-Jones model has a larger disturbance to the fluid particles near boundary, result-ing in particle movement disordered and flow blocked, while the normal repulsive model is more suitable for SPH.