Numerical simulation of contact heat transfer between particles by TDEM
Heat transfer in paniculate systems plays an important role in a range of industrial processes, such as drying, heating, cooling, and so on. However, the inter-particle heat transfer mechanism is comparatively less understood. Due to the multi-scale complexity of the system and the limitations of measurement techniques, the details of the processes are difficult to investigate experimentally. DEM is a powerful tool for us to obtain insight into the dynamics of particulate system. To extend the classical DEM to the Thermal Discrete Element Method (TDEM) for paniculate system with heat transfer, the effect of softening treatment for TDEM was analyzed, which results in the change of some important microbehaviors of inter-particle, such as impact time and contact area etc, and the unrealistic heat transfer between particles. Two coefficients, time restoration coefficient Crt and area restoration coefficient Cra, were derived to simulate the contact heat transfer between particles more realistically even if particle stiffness is artificially adjusted by several orders while a large time step is taken to save computational cost.
heat transfer thermal discrete element method softening treatment
L.Y.LU Z.L.Gu K.B.Lei Kiwamu Kase
Xian Jiaotong University.Xian, China RIKEN Institute, Wako, Japan Xian Jiaotong University.Xian, China RIKEN Institute, Wako, Japan Xian Jiaotong University.Xian, China RIKEN Institute, Wako, Japan
国际会议
西安
英文
968-973
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）