CAJ | 학술논문

该文提出了一种稳定的移动粒子半隐式法(MPS).分析了MPS方法求解封闭区域流动的有解条件、自由面流动中粒子以较大速度撞击壁面或液面时出现的不稳定现象.为了解决这些问题,提出了Navier-Stokes方程新的求解算法和自由面边界处理方法.改进后的MPS方法提高了计算的稳定性,采用该方法成功模拟了自由面流动的溃坝现象,从而验证了该方法的有效性.
해문제출료일충은정적이동입자반은식법(MPS).분석료MPS방법구해봉폐구역류동적유해조건、자유면류동중입자이교대속도당격벽면혹액면시출현적불은정현상.위료해결저사문제,제출료Navier-Stokes방정신적구해산법화자유면변계처리방법.개진후적MPS방법제고료계산적은정성,채용해방법성공모의료자유면류동적궤패현상,종이험증료해방법적유효성.
The objective of this study is to propose a stable moving particle semi-implicit (MPS) method for the fluid dynamics analysis. The solvable condition for the MPS simulations was investigated in an enclosed calculation region and the reason for the numerical instability was analyzed when the MPS particles knock at the solid wall or liquid surface is with a relatively large velocity. A new solution algorithm and boundary treatment methods for the free surface were developed to solve the Navier-Stokes equations. The modified MPS method greatly improves the numerical calculation stability. It has been employed to stably simulate the broken-dam phenomena. The results verify that the modified MPS method is very effective for the fluid dynamics analysis.