A MODIFIED PRESSURE-STRAIN MODEL FOR SIMULATING STRONGLY SWIRLING FLOWS IN A CYCLONE SEPARATOR

The Isotropization of Production and Convection plus wall reflection pressure-strain model(IPCM plus wall model) in the Reynolds stress equation is modified for simulating strongly swirling turbulent flows in cyclone separators and is incorporated into the platform of FLUENT 6.0.The three-dimensional turbulent flows in a volute cyclone separator are simulated using modified and standard Isotropization of Production and Convection plus wall reflection models,the Isotropization of Production and Convection models(IPCM models) as well as the Quadratic Pressure-Strain Model(SSG model).Predictions of the time-averaged velocities and Reynolds stresses in the separation space and dust hopper are verified by LDV experimental results.The results indicate that tangential and axial velocities,normal Reynolds stress components,as well as shear stresses predicted using the modified IPCM plus wall model are much better than those obtained using other pressure-strain models.