A finite particle method with particle shifting technique for modeling particulate flows with thermal convection
A finite particle method with particle shifting technique for modeling particulate flows with thermal convection
复制标题
采用粒子移动技术的有限粒子方法，用于模拟热对流颗粒流
DOI：
10.1016/j.ijheatmasstransfer.2018.09.074
复制
发表时间：
2019
影响因子：
5.2
通讯作者：
Liu M. B.
中科院分区：
文献类型：
--
作者：
Zhang Z. L.;Walayat K.;Huang C.;Chang J. Z.;Liu M. B.
颗粒热对流流动由于存在不断移动的边界和复杂的热-流耦合效应，数值模拟具有很大的挑战性。无网格法和粒子法在模拟复杂的动边界流动时具有独特的优势。然而，以前的工作基于无网格模拟主要集中在颗粒流与动量交换或自然热对流。本文提出了一种结合粒子移动技术的有限粒子法（FPM-PST），用于模拟颗粒热对流流动。FPM是一种改进的光滑粒子流体动力学（SPH）方法，具有更好的精度，但极端不规则的粒子分布可能导致病态的校正矩阵，并终止模拟。PST可以通过移动高度无序的颗粒来实现规则的颗粒分布，而目前的PST是基于传统的SPH，其精度较差。数值算例表明，FPM-PST是一种新的热颗粒流数值模拟方法，具有良好的精度和稳定性。它比传统的SPH具有更好的精度，并可以获得与其他来源的结果相媲美。FPM-PST也可以避免非物理空隙。从FPM-PST模拟，它被观察到，在相对较低的雷诺数热或冷颗粒和流体之间的热对流引起显着增加或减少的阻力作用在颗粒上，而热对流对颗粒运动的影响在相对较高的雷诺数。
Particulate flows with thermal convection are very challenging to simulate numerically due to the existence of constantly moving boundaries and complex heat-fluid coupling effects. Meshfree and particle methods have special advantages in modeling complex fluid flows with moving boundaries. However, previous works based on meshfree modeling mainly focused on either particulate flows only with momentum exchange or natural thermal convection. In this paper, a finite particle method integrated with particle shifting technique (FPM-PST) is developed for modeling particulate flows with thermal convection. FPM is an improved smoothed particle hydrodynamics (SPH) method with better accuracy while extremely irregular particle distribution may lead to ill-conditioned corrective matrix and terminate the simulation. PST can achieve regular particle distribution through shifting highly disordered particles while current PST is based on conventional SPH of poor accuracy. A number of numerical examples demonstrated that FPM-PST is a novel approach for modeling thermal particulate flows with good performance in accuracy and stability. It has better accuracy than the conventional SPH and can obtain comparable results with those from other sources. The unphysical voids can also be avoided by FPM-PST. From the FPM-PST simulations, it is observed that at relatively low Reynolds numbers thermal convection between hotter or colder particles and the fluid causes significant increase or decrease in the drag force acting on particles, while the thermal convection has little influence on the particle motion at relatively high Reynolds numbers.
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DOI：
10.1016/j.ijheatmasstransfer.2018.05.007
发表时间：
2018-11
影响因子：
5.2
作者：
K. Walayat;Zekun Wang;K. Usman;Moubin Liu
通讯作者：
K. Walayat;Zekun Wang;K. Usman;Moubin Liu
DOI：
10.1080/10407790590935975
发表时间：
2005-07
期刊：
Numerical Heat Transfer, Part B: Fundamentals
影响因子：
--
作者：
J. R. Pacheco;A. Pacheco-Vega;T. Rodić;R. Peck
通讯作者：
J. R. Pacheco;A. Pacheco-Vega;T. Rodić;R. Peck
影响因子：
5
作者：
Moubin Liu;W. Xie;Guirong Liu
通讯作者：
Moubin Liu;W. Xie;Guirong Liu
DOI：
10.1016/s0045-7825(01)00254-7
发表时间：
2001-01-01
影响因子：
7.2
作者：
Gray, JP;Monaghan, JJ;Swift, RP
通讯作者：
Swift, RP
离散奇异卷积浮力驱动腔的新基准质量解决方案
影响因子：
1
作者：
Wan, DC;Patnaik, BSV;Wei, GW
通讯作者：
Wei, GW