|
| Study of turbulence model on the interaction of particle turbulence and particle collision |
| Received:November 08, 2009 Revised:March 11, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201104021 |
| KeyWord:gas-particle flows turbulence two-scale fluctuation |
| Author | Institution |
| 曾卓雄 |
南昌航空大学 飞行器工程学院,南昌 |
| 孙海俊 |
南昌航空大学 飞行器工程学院,南昌 |
| 潘阳 |
华东交通大学 土木建筑学院,南昌 |
|
| Hits: 2430 |
| Download times: 1790 |
| Abstract: |
| The key problem in turbulent gas-particle flows is to understand the interaction of particle turbulence and particle collision. Based on the approaches by combination of the particle kinetic theory with particle turbulence models, previous studies make some progress. However, theoretically they remain to be justified and improved. In this paper, based on the concept of particle large scale fluctuation due to turbulence and small scale fluctuation due to inter-particle collision, a particle two-scale k-epsilon turbulence model is proposed in the framework of two-fluid models. This model is used to simulate gas-particle flows in a downer and in a sudden-expansion chamber. The simulation results are compared with experimental results and the simulation results obtained by the five-equation turbulence model which combines single-scale k-epsilon two-phase model with the particle kinetic theory. It is found that the present model makes some improvement. |