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工程力学  2013 

双股液体射流撞击雾化的SPH方法数值模拟

DOI: 10.6052/j.issn.1000-4750.2011.10.0688, PP. 17-23

Keywords: 光滑粒子流体动力学,雾化过程,液体射流撞击,粘性,人工应力

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Abstract:

双股液体射流撞击雾化过程存在复杂的界面运动,传统网格法很难处理。运用SPH方法对双股液体射流撞击雾化问题进行三维数值模拟;根据实际的双股液体射流撞击雾化过程提出了合理的简化模型;弱可压缩状态方程中参考压强采用了新的计算公式;利用有限差分与SPH一阶导数相结合的方法处理粘性项中的二阶导数;对人工应力提出了新的参数值选择方案。将数值仿真结果与文献实验结果进行对比,二者比较吻合,表明SPH方法很适合解决射流撞击雾化等复杂的界面运动问题。

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