CAJ | 학술논문

应用光滑粒子流体动力学（SPH）方法进行了幂律型流体的突缩型管路流动过程仿真。推导了SPH形式的流体动力学控制方程，应用罚方法施加边界条件，应用人工应力消除拉伸不稳定现象，应用XSPH方法规范粒子秩序。提出了幂律型本构关系的SPH求解方法，推导了剪切速率及粘性项的计算公式。应用Poiseuille流算例对本文的幂律型本构求解方法进行了验证，获取了幂律型流体在突缩管中的流动特性，并与水的流动特性进行了对比分析。讨论了流动特性的成因。
응용광활입자류체동역학（SPH）방법진행료멱률형류체적돌축형관로류동과정방진。추도료SPH형식적류체동역학공제방정，응용벌방법시가변계조건，응용인공응력소제랍신불은정현상，응용XSPH방법규범입자질서。제출료멱률형본구관계적SPH구해방법，추도료전절속솔급점성항적계산공식。응용Poiseuille류산례대본문적멱률형본구구해방법진행료험증，획취료멱률형류체재돌축관중적류동특성，병여수적류동특성진행료대비분석。토론료류동특성적성인。
The flowing characteristics of the power-law fluid in the sharply contractive pipe were simulated with the smoothed particle hydrodynamics （SPH） method. The control equations of SPH fluid dynamics were deduced, which imposed boundary conditions by penalty function, avoided so-called stretching instability by artificial stress and regulated the particle distribution with XSPH method. The SPH solving formula of power-law model is proposed and the algorithms of shear rate and viscosity term are presented. The formula was verified by a calculation example of Poiseuille flow. The flowing characteristics of both power-law fluid and Newtonian fluid in sharply contractive pipe were obtained. The flowing characteristics of the power-law fluid are analyzed and discussed.