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本文将移动粒子半隐式法(MPS)的基本算法由二维扩展至三维。将圆柱坐标系引入到初场粒子的布置中,避免了在笛卡儿坐标系下处理不规则形状(如斜边或曲边)问题时粒子初场布置困难和精确度较低的问题,改善了对计算边界条件表达的精确性。引入移动边界模型,对直叶片搅拌器的内部流动进行了三维数值模拟。还提出了一种新的初始粒子布置简易方法,明显简化粒子初始布置时的复杂程度,提高了对三维复杂几何形状问题的可操作性。
In this paper, the basic algorithm of moving particle semi-implicit method (MPS) is expanded from two-dimensional to three-dimensional. The introduction of a cylindrical coordinate system into the arrangement of the primary particles avoids the problem of poor initial placement and low accuracy of the particles when dealing with irregular shapes (such as hypotenuse or curl) in a Cartesian coordinate system, and improves The accuracy of calculating boundary conditions is expressed. The moving boundary model is introduced to simulate the internal flow of straight blade mixer. A new simple method of initial particle placement is also proposed, which obviously simplifies the complexity of the initial placement of particles and improves the operability of the 3D complex geometry.