摘要
The three-demensional turbulent flow in a stirred vessel driven by a Rushton turbine was simulated by using the anisotropic differential Reynolds stress model (RSM).The effect of the turbulent model, modeling approach and discretization scheme on mean velocities and turbulent kinetic energy was investigated.The RSM was found to give vortex structure and positions near the blade reasonably.The two peak distribution of turbulent intensity near the blade tip could be effectively reflected by both the RSM and the anisotropic k-ε model;however the predicted results of velocity fluctuations by the RSM and the sliding mesh approach showed better agreement with the reported experimental data than by the anisotropic k-ε model and the multiple reference frames(MRF)approach, and the simulated turbulent kinetic energy was still under-predicted by the RSM.The simulated results validated by reported experimental data showed that the prediction ability for turbulent flow by the QUICK scheme approached second-order upwind scheme’s ability and both of them were better than first-order precision schemes.
The three-demensional turbulent flow in a stirred vessel driven by a Rushton turbine was simulated by using the anisotropic differential Reynolds stress model （RSM）. The effect of the turbulent model, modeling approach and discretization scheme on mean velocities and turbulent kinetic energy was investigated. The RSM was found to give vortex structure and positions near the blade reasonably. The two peak distribution of turbulent intensity near the blade tip could be effectively reflected by both the RSM and the anisotropic k-~ model; however the predicted results of velocity fluctuations by the RSM and the sliding mesh approach showed better agreement with the reported experimental data than by the anisotropic k-~ model and the multiple reference frames （MRF） approach, and the simulated turbulent kinetic energy was still under-predicted by the RSM. The simulated results validated by reported experimental data showed that the prediction ability for turbulent flow by the QUICK scheme approached second-order upwind scheme＇s ability and both of them were better than first-order precision schemes.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第9期2053-2057,共5页
CIESC Journal
基金
湖南省自然科学基金项目(05JJ30026).~~
关键词
搅拌釜
雷诺应力模型
数值模拟
stirred tank
Reynolds stress model
numerical simulation
