Numerical simulation of impinging jet flows by modified MPS method
Numerical simulation of impinging jet flows by modified MPS method
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DOI：
10.1108/ec-01-2015-0002
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发表时间：
2015-06
影响因子：
1.6
通讯作者：
Zhenyuan Tang;D. Wan
中科院分区：
文献类型：
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作者：
Zhenyuan Tang;D. Wan
目的-基于改进的移动质点半隐式(MPS)方法，用MLParticle-SJTU内部求解程序研究了通常伴随着较大界面运动的射流撞击，该方法可以提供更精确的压力场和变形的界面形状。并将数值结果与解析解的压力分布和自由面形状进行了比较。本文旨在探讨这些问题。设计/方法/途径-为了避免传统MPS方法的不稳定性，采用了一种改进的MPS方法，包括泊松压力方程的混合源项、无奇异性核函数、动量守恒梯度模型和高精度自由面检测方法。对改进后的MPS中的改进方案进行了详细的分析。特别考虑了PPE中的三种源项：粒子数密度(PND)法、混合源项和无散度法。二..。
Purpose – The jet impingement usually accompanying large interface movement is studied by the in-house solver MLParticle-SJTU based on the modified moving particle semi-implicit (MPS) method, which can provide more accurate pressure fields and deformed interface shape. The comparisons of the pressure distribution and the shape of free surface between the presented numerical results and the analytical solution are investigated. The paper aims to discuss these issues. Design/methodology/approach – To avoid the instability in traditional MPS, a modified MPS method is employed, which include mixed source term for Poisson pressure equation (PPE), kernel function without singularity, momentum conservative gradient model and highly precise free surface detection approach. Detailed analysis on improved schemes in the modified MPS is carried out. In particular, three kinds of source term in PPE are considered, including: particle number density (PND) method, mixed source term method and divergence-free method. Two...