On stochastic modeling of heavy particle dispersion in large-eddy simulation of two-phase turbulent flow
On stochastic modeling of heavy particle dispersion in large-eddy simulation of two-phase turbulent flow
复制标题
DOI：
10.1007/1-4020-4977-3_36
复制
发表时间：
2006-12
期刊：
影响因子：
--
通讯作者：
B. Shotorban;F. Mashayek
中科院分区：
文献类型：
--
作者：
B. Shotorban;F. Mashayek
子网格尺度对重粒子分散的影响可能是显著的，特别是当子网格能量含量不可忽略和/或粒子时间常数很小的时候。在此工作中，使用一个修正的朗之万型方程来重建粒子动量方程中所需要的流体粒子的瞬时速度。为了评估该模型，通过先验试验研究了一个衰减的各向同性湍流。模型与DNS结果吻合较好。
The effect of subgrid scales on the dispersion of heavy particles could be significant especially when the subgrid energy content is not negligible and/or the particle time constant is small. In this work, a modified Langevin type equation is used to reconstruct the instantaneous velocity of the seen fluid particle which is needed in the particle momentum equation. To assess the model, a decaying isotropic turbulence is studied via a priori test. A good agreement between the model and DNS results is observed.