Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach
Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach
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DOI：
10.1007/s40571-020-00321-w
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发表时间：
2020-02
影响因子：
3.3
通讯作者：
C. Joulin;J. Xiang;J. Latham;C. Pain;P. Salinas
中科院分区：
文献类型：
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作者：
C. Joulin;J. Xiang;J. Latham;C. Pain;P. Salinas
本文提出了一种新的三维离散粒子系统传热建模方法。使用组合有限离散元（FDEM）的方法，接触表面的数值计算时，两个离散网格的两个固体经历一个小的重叠。固体内部和固体之间的热传导和热通量是相互联系的。在传统的FEM（有限元法）或DEM（离散元法）方法中，为了模拟跨接触体的热传递，接触表面不直接重建。这里采用的方法使用的表面元素的数量从穿透边界网格，形成一个多边形的交集，从而在一个显着减少的网格依赖性的方法。此外，这种新方法适用于组成颗粒系统的任何尺寸或形状，并且颗粒之间的热分布是模型的固有特征。该FDEM方法针对两种模型进行了验证：FEM模型和DEM管网模型。此外，还提出了一种复杂形状颗粒的多颗粒传热接触问题。
This paper presents a new approach for the modelling of heat transfer in 3D discrete particle systems. Using a combined finite–discrete element (FDEM) method, the surface of contact is numerically computed when two discrete meshes of two solids experience a small overlap. Incoming heat flux and heat conduction inside and between solid bodies are linked. In traditional FEM (finite element method) or DEM (discrete element method) approaches, to model heat transfer across contacting bodies, the surface of contact is not directly reconstructed. The approach adopted here uses the number of surface elements from the penetrating boundary meshes to form a polygon of the intersection, resulting in a significant decrease in the mesh dependency of the method. Moreover, this new method is suitable for any sizes or shapes making up the particle system, and heat distribution across particles is an inherent feature of the model. This FDEM approach is validated against two models: a FEM model and a DEM pipe network model. In addition, a multi-particle heat transfer contact problem of complex-shaped particles is presented.