arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1603.02421physics.flu-dyn
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液体射流破碎的光滑粒子流体动力学数值模拟(SPH)

Numerical simulation of liquid jet breakup using smoothed particle hydrodynamics (SPH)

Majid Pourabdian, Pourya Omidvar, Mohammad Reza Morad

摘要:

本文采用光滑粒子流体动力学(SPH)无网格拉格朗日数值方法对液体射流破碎过程进行了数值模拟。基于SPH方法对流动控制方程进行离散。在本文中,SPHysics开放源代码已被用于数值解。因此,上述代码已被开发,增加了表面张力的影响。最后,以溃坝障碍物问题为例,对所提出的方法进行了验证。最后,对二维液体射流进行了数值模拟,研究了考虑单相流时射流的破碎行为。计算了不同雷诺数和韦伯数等流动条件下的瑞利区液体破碎长度,并通过实验关联式对计算结果进行了验证。文德兰核函数和三次样条核函数的数值解都是完整的,文德兰核函数的数值解更精确。对于无粘流体,将计算结果与MPS方法进行了比较。模拟结果表明,光滑粒子流体动力学(SPH)是模拟液体射流破碎现象的有效方法。

英文摘要:

In this paper, breakup of liquid jet is simulated using smoothed particle hydrodynamics (SPH) which is a meshless Lagrangian numerical method. For this aim, flow governing equations are discretized based on SPH method. In this paper, SPHysics open source code has been utilized for numerical solutions. Therefore, the mentioned code has been developed by adding the surface tension effects. The proposed method is then validated using dam break with obstacle problem. Finally, simulation of twodimensional liquid jet flow is carried out and its breakup behavior considering one-phase flow is investigated. Length of liquid breakup in Rayleigh regime is calculated for various flow conditions such as different Reynolds and Weber numbers and the results are validated by an experimental correlation. The whole numerical solutions are accomplished for both Wendland and cubic spline kernel functions and Wendland kernel function gave more accurate results. The results are compared to MPS method for inviscid liquid as well. The accomplished modeling showed that smoothed particle hydrodynamics (SPH) is an efficient method for simulation of liquid jet breakup phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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