期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Prediction of medium-to-coal ratio effect in a dense medium cyclone by using both traditional and coarse-grained CFD-DEM models
1
作者 Zhaoyang Li Kaiwei Chu +2 位作者 Zongqing Zhou Yixiong Feng Aimin Wang 《Particuology》 SCIE EI CAS CSCD 2022年第9期44-56,共13页
Dense medium cyclone(DMC)is the working horse in coal industry.In practice,it is usually operated under constant pressure and the operational conditions(mainly medium-to-coal(M:C)ratio and oper-ational pressure)need t... Dense medium cyclone(DMC)is the working horse in coal industry.In practice,it is usually operated under constant pressure and the operational conditions(mainly medium-to-coal(M:C)ratio and oper-ational pressure)need to be adjusted according to coal washability data(mainly coal particle size and density distributions).Nonetheless,until now it is still not well understood how the M:C ratio would affect the performance of DMCs especially under the practical conditions.In this work,the effect of M:C ratio is for the first time numerically studied under conditions similar to plant operation by using both tra-ditional and coarse-grained(CG)combined approach of computational fluid dynamics(CFD)and discrete element method(DEM),called as traditional CFD-DEM and CG CFD-DEM,in which the flow of coal par-ticles is modelled by DEM or CG DEM which applies Newton's laws of motion to individual particles and that of medium flow by the conventional CFD which solves the local-averaged Navier-Stokes equations,allowing consideration of particle-fluid mutual interaction and particle-particle collisions.Moreover,impulse and momentum connection law is used to achieve energy conservation between traditional CFD-DEM and CG CFD-DEM.It is found that under constant pressure,the M:C ratio affects DMC perfor-mance significantly.The specific effect depends on coal washability or coal type.Under extremely low M:C ratio,the phenomenon that high-quality coal product is misplaced to reject is successfully repro-duced,which has been observed in plants in Australian coal industry and called as"low-density tail".Moreover,strategies are proposed to mitigate the"low-density tail"phenomenon based on the model. 展开更多
关键词 dense medium cyclone medium-to-coal ratio Discrete element method Computational fluid dynamics Low-density coal tail
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部