为了更细致地考察两相流动中颗粒间的碰撞现象及颗粒碰撞对颗粒相、流体相产生的具体影响,本文在双向耦合、颗粒St=3、满质量载荷工况下对气固两相三维平面混合层流场进行了直接数值模拟.其中对颗粒跟踪采用Lagrangian方法,颗粒间的碰撞采用硬球模型.数值结果表明:考虑了颗粒间的碰撞后,在流场发展末期,颗粒分布得更加均匀,流体相相互混合程度提高,两相平均流向速度降低,湍动能增强.
参考文献
[1] | Fan JR.;Luo K.;Zheng YQ.;Jin HH.;Cen KF. .Modulation on coherent vortex structures by dispersed solid particles in a three-dimensional mixing layer - art. no. 036309[J].Physical review.E.Statistical physics, plasmas, fluids, and related interdisciplinary topics,2003(3 Pt.2):6309-0. |
[2] | Yamamoto Y.;Tanaka T.;Kajishima T.;Tsuji Y.;Potthoff M. .Large-eddy simulation of turbulent gas-particle flow in a vertical channel: effect of considering inter-particle collisions[J].Journal of Fluid Mechanics,2001(0):303-334. |
[3] | Tong X-L;Wang L-P .Two-way coupled particle-laden mixing layer. Part 1: linear instability[J].International Journal of Multiphase Flow,1999(4):575-598. |
[4] | 罗坤,郑友取,樊建人,岑可法.三维混合层中大涡结构与扩散颗粒的相互作用[J].中国化学工程学报(英文版),2003(04):377-382. |
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