این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Iranian Journal of Chemical Engineering، جلد ۱۶، شماره ۲، صفحات ۴۱-۵۶
عنوان فارسی Segregation patterns of an equidensity TiO۲ ternary mixture in a conical fluidized bed: CFD and experimental study
چکیده فارسی مقاله In this study, an Eulerian-Eulerian multi-fluid model (MFM) was used to simulate the segregation pattern of a conical fluidized bed containing ternary mixtures of equidensity TiO2‌ particles. Experimental 'freeze–sieving' method was employed to determine the axial mass fraction profiles of the different-sized particles, and validate the simulation results. The profiles of mass fraction for large, medium and small sized particles along the bed height during the simulation time indicated that the particles’ segregation can be predicted by CFD model. Effect of superficial gas velocity on segregation pattern was also investigated. It was shown that for U0=1.2Umf, partial segregation of large particles occurred, while for U0=1.6Umf, small and medium size particles also segregated and full segregation was achieved. By increasing U0 to 2Umf, mixing of different sized particles was increased and particles segregation was reduced. Therefore, it can be concluded that there was a critical velocity below which particles would segregate while above which their mixing increased.
کلیدواژه‌های فارسی مقاله Fluidized bed،، CFD simulation،، Multi fluid model،، Ternary mixture،، Segregation،
عنوان انگلیسی Segregation patterns of an equidensity TiO2 ternary mixture in a conical fluidized bed: CFD and experimental study
چکیده انگلیسی مقاله In this study, an Eulerian-Eulerian multi-fluid model (MFM) was used to simulate the segregation pattern of a conical fluidized bed containing ternary mixtures of equidensity TiO2‌ particles. Experimental 'freeze–sieving' method was employed to determine the axial mass fraction profiles of the different-sized particles, and validate the simulation results. The profiles of mass fraction for large, medium and small sized particles along the bed height during the simulation time indicated that the particles’ segregation can be predicted by CFD model. Effect of superficial gas velocity on segregation pattern was also investigated. It was shown that for U0=1.2Umf, partial segregation of large particles occurred, while for U0=1.6Umf, small and medium size particles also segregated and full segregation was achieved. By increasing U0 to 2Umf, mixing of different sized particles was increased and particles segregation was reduced. Therefore, it can be concluded that there was a critical velocity below which particles would segregate while above which their mixing increased.
کلیدواژه‌های انگلیسی مقاله Fluidized bed, CFD simulation, Multi fluid model, Ternary mixture, Segregation
نویسندگان مقاله M. rasteh |
Department of Chemical Engineering, Hamedan University of Technology, P.O. Box, 65155 Hamedan, Iran.

نشانی اینترنتی http://www.ijche.com/article_90028_abf582aae236eee06988acf7306df47a.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/443/article-443-1684357.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات