An improved parallel SPH approach to solve 3D transient generalized Newtonian free surface flows
An improved parallel SPH approach to solve 3D transient generalized Newtonian free surface flows
复制标题
一种改进的并行 SPH 方法来求解 3D 瞬态广义牛顿自由表面流
DOI：
10.1016/j.cpc.2016.04.014
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发表时间：
2016-08
影响因子：
6.3
通讯作者：
Li Gang
中科院分区：
文献类型：
--
作者：
Ren Jinlian;Jiang Tao;Lu Weigang;Li Gang
本文提出了一种修正的平行光滑粒子流体动力学（C-SPH）方法来模拟低雷诺数下的三维广义牛顿自由表面流动，特别是研究了三维粘性射流的屈曲问题。C-SPH方法是将一种基于不可压条件的改进SPH方法与传统SPH方法（TSPH）耦合而成，即在流体区域内部采用带扩散项和一阶Kernel梯度修正的改进SPH方法，而在自由表面附近采用TSPH方法。因此，C-SPH方法具有两种方法的优点。同时，针对三维多边界问题，提出了一种方便有效的边界处理方法，并采用MPI并行化技术和动态单元邻域粒子搜索方法提高了计算效率。通过求解多个基准问题验证了C-SPH算法的有效性和优越性，并与其他结果进行了比较。然后采用C-SPH方法模拟了基于Cross模型的粘性射流折叠/盘绕过程，并与其他实验或数值结果进行了比较。特别讨论了宏观参数对流动的影响。计算结果与已有数据吻合较好，表明C-SPH方法在求解三维运动自由面流动时具有较高的精度和较好的稳定性。
In this paper, a corrected parallel smoothed particle hydrodynamics (C-SPH) method is proposed to simulate the 3D generalized Newtonian free surface flows with low Reynolds number, especially the 3D viscous jets buckling problems are investigated. The proposed C-SPH method is achieved by coupling an improved SPH method based on the incompressible condition with the traditional SPH (TSPH), that is, the improved SPH with diffusive term and first-order Kernel gradient correction scheme is used in the interior of the fluid domain, and the TSPH is used near the free surface. Thus the C-SPH method possesses the advantages of two methods. Meanwhile, an effective and convenient boundary treatment is presented to deal with 3D multiple-boundary problem, and the MPI parallelization technique with a dynamic cells neighbor particle searching method is considered to improve the computational efficiency. The validity and the merits of the C-SPH are first verified by solving several benchmarks and compared with other results. Then the viscous jet folding/coiling based on the Cross model is simulated by the C-SPH method and compared with other experimental or numerical results. Specially, the influences of macroscopic parameters on the flow are discussed. All the numerical results agree well with available data, and show that the C-SPH method has higher accuracy and better stability for solving 3D moving free surface flows over other particle methods.
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影响因子：
1.8
作者：
Basa, Mihai;Quinlan, Nathan J.;Lastiwka, Martin
通讯作者：
Lastiwka, Martin
选择性退出微腔的 SPH 模拟
影响因子：
2.8
作者：
Xipeng Li;Peng Wang;Junwu Wang;Jinghai Li
通讯作者：
Jinghai Li
DOI：
10.1002/(sici)1097-0363(19991230)31:8
发表时间：
1999-12
影响因子：
1.8
作者：
M. F. Tomé;S. McKee;L. Barratt;D. Jarvis;A. J. Patrick
通讯作者：
M. F. Tomé;S. McKee;L. Barratt;D. Jarvis;A. J. Patrick
影响因子：
5
作者：
Moubin Liu;W. Xie;Guirong Liu
通讯作者：
Moubin Liu;W. Xie;Guirong Liu
影响因子：
3.1
作者：
Xiaoyang Xu;Ouyang Jie;T. Jiang;Qiang Li
通讯作者：
Xiaoyang Xu;Ouyang Jie;T. Jiang;Qiang Li