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基于黎曼解的粒子间接触算法在SPH中的应用

DOI: 10.11858/gywlxb.2006.01.018, PP. 93-96

Keywords: 黎曼解,接触算法,可变光滑长度

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Abstract:

采用光滑粒子流体动力学(SPH)方法模拟大变形问题具有明显的优点,但传统的SPH方法在模拟冲击波与接触界面的作用时,往往会出现压力的反常跳动。采用黎曼解描述粒子间相互作用的接触算法对传统SPH方法进行修正,计算了激波管和飞片碰撞(包含接触界面)问题中波的传播,并将计算结果与解析解作比较。结果表明,与传统的光滑粒子法相比,该改进的光滑粒子法无需引入人工粘性项和人工热流项,程序结构简洁,且能较好地处理接触界面问题,从而能有效提高计算精度。

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