CFD simulation of gas-solid flow in freely bubbling fluidized bed contain the FCC particles (Geldart A)

سال انتشار: 1387
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,761

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شناسه ملی سند علمی:

CFD11_013

تاریخ نمایه سازی: 12 مرداد 1387

چکیده مقاله:

In this paper hydrodynamics of the bubbling gas–solid fluidized bed containing the fluid catalytic cracking (FCC) particles with 57.4 μm diameter was simulated using the Eulerian–Eulerian approach. For this purpose, between the empirical correlations and kinetic theory of granular flows (KTGF), KTGF was selected to describe the rheology of solid phase as a continuum phase. For simulation of gas–solid fluidized bed, include the fine particles, the cohesive forces must be considered. For this reason the drag force that is one of the dominant forces in fluidized bed systems can be modified. Therefore, the modified Gibilaro drag model was used by obtaining the appropriate value of scale factor (SF) experimentally. This method is mainly caused the reduction of computational time especially for simulation of large-scale systems. The ranges of superficial gas velocity were 0.3-0.5 m/s. In addition, time-average local voidage was compared to experimental data and this comparison was acceptable.

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نویسندگان

Seyyed Hossein Hosseini

Ph.D Student Department of Chemical Engineering University of Sistan and Baluchistan

Rahbar Rahimi

Associate Professor Department of Chemical Engineering University of Sistan and Baluchistan

Mortaza Zivdar

Associate Professor Department of Chemical Engineering University of Sistan and Baluchistan

Abdol Reza Samimi

Associate Professor Department of Chemical Engineering University of Sistan and Baluchistan

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