Effect of inertial particles with different specific heat capacities on heat transfer in p

Effect of inertial particles with different specific heat capacities on heat transfer in particle-laden

turbulent flow

Caixi LIU;Shuai TANG;Yuhong DONG

【期刊名称】《应用数学和力学（英文版）》 【年(卷),期】2017(038)008

【摘要】The effect of inertial particles with different specific heat on heat transfer in particle-laden turbulent channel flows is studied using the direct numerical simulation (DNS) and the Lagrangian particle tracking method.The simulation uses a two-way coupling model to consider the momentum and thermal interactions between the particles and turbulence.The study shows that the temperature fields display differences between the particle-laden flow with different specific heat particles and the particle-free flow,indicating that the particle specific heat is an important factor that affects the heat transfer process in a particle-laden flow.It is found that the heat transfer capacity of the particle-laden flow gradually increases with the increase of the particle specific heat.This is due to the positive contribution of the particle increase to the heat transfer.In addition,the Nusselt number of a particle-laden flow is compared with that of a particle-free flow.It is found that particles with a large specific heat strengthen heat transfer of turbulent flow,while those with small specific heat weaken heat