Statistical Analysis of CFD Simulations in a Spouted Bed
- سال انتشار: 1393
- محل انتشار: پنجمین کنفرانس ملی کاربرد CFD در صنایع شیمیایی و نفت
- کد COI اختصاصی: NCFDACCI05_016
- زبان مقاله: انگلیسی
- تعداد مشاهده: 1217
نویسندگان
PhD candidate, Department of Mechanical Engineering, Sharif University of Technology
چکیده
Spouted beds are widely used as gas-solid contactors in various physical and chemical processes. In order to improve the design of spouted beds for efficient gas-solid contact, a better understanding of the complex flow field of granular solids is required. In this paper, numerical modeling using FLUENT 6.3 commercial software was utilized to study the flow in a slot-rectangular spouted bed. Two-phase gas-solid flows in the bed were simulated with the computational fluid dynamics (CFD) technique using the two-phase Eulerian-Eulerian granular model. Two-dimensional computer simulations were performed to predict different flow regimes. The diagnostics of flow regime transitions have been provided by the analysis of absolute pressure fluctuations. Clear differences have been observed in the calculated mean value, standard deviation, maximum amplitude, skewness, and kurtosis of the absolute pressure fluctuations for different superficial gas velocities and bed heights. Analysis of variance has been used to examine various data with different flow regimes. The local minimums of the calculated values of correlation coefficient and covariance reveal occurrence of flow transitionsکلیدواژه ها
Spouted bed, flow regime, multiphase, two-dimensional, Hydrodynamics, CFDمقالات مرتبط جدید
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