کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
621122 | 1455160 | 2016 | 7 صفحه PDF | دانلود رایگان |
• The radial profiles of the mean axial velocity from LDA and LES were compared.
• The velocity profiles from LES coincide very well with the LDA experiments.
• The power number from LES coincides very well with the value from the literature.
• Impeller pumping number can be calculated from radial profile of axial velocity.
• Recommendation to calculate induced flow rate from the mean flow rate at the plane.
This study deals with a large eddy simulation (LES) of the single-phase turbulent flow in a fully baffled mixed vessel stirred by a pitched six-blade impeller. The ANSYS FLUENT 15.7 commercial CFD programme was employed. The LES turbulent model is used with the dynamic Smagorinsky–Lilly model. The Werner–Wengle wall function is used to cope with the requirements of near the wall cell size of the LES model. The sliding mesh (SM) model was used for simulating the impeller movement. The results of the simulations are compared with experimental data obtained by previous LDA measurements of the radial profiles of the axial component of the ensemble averaged mean velocity in the impeller discharge flow. The volume flow rates and the flow rate criteria were calculated from these velocity profiles, and were compared with the flow rates determined from the horizontal vessel cross section from simulation.
Figure optionsDownload high-quality image (280 K)Download as PowerPoint slide
Journal: Chemical Engineering Research and Design - Volume 108, April 2016, Pages 42–48