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CFD simulation and experimental analysis of flow dynamics and grinding performance of opposed fluidized bed air jet mill

Munusamy, Sri Raj Rajeswari and Mohd. AzuzliAzizli, Khairun Azizi and Saiyid Hashim, Syed Fuad and Abdullah, Mohd. K and Mohamad, Abdul Mujeebu and Abdullah, Mohd. Zulkifly (2011) CFD simulation and experimental analysis of flow dynamics and grinding performance of opposed fluidized bed air jet mill. [Citation Index Journal]

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Abstract

This paper presents a three dimensional Computational Fluid Dynamics (CFD) model to investigate the flow dynamics of solid–gas phases during fine grinding in an air jet mill. Alpine 100AFG fluidized bed air jet mill is considered for the study and the jet milling model is simulated using FLUENT 6.3.2 using a standard k-ε model. The model is developed in GAMBIT 2.3.16 and meshed by tet/hybrid (T-Grid) and Triangular (Pave) meshes. The effects of operating parameters such as solid feed rate, grinding air pressure and internal classifier speed on the performance of the jet mill are analyzed. The CFD simulation results are presented in the forms of dual phase vector plot, volume fraction of phases and particle trajectories during fine grinding process. Themass of ground feed entering and leaving the cyclone (underflow) is also computed by simulation. The proposed model gives realistic predictions of the flow dynamics within the jet mill. Experiments are conducted on the Alpine 100AFG jet mill to study the particle size, morphology and mass of the ground product. The numerical results are found in good agreement with the experimental results.

Item Type:Citation Index Journal
Subjects:T Technology > T Technology (General)
Departments / MOR / COE:Departments > Chemical Engineering
Research Institutes > Institute for Sustainable Building
ID Code:8525
Deposited By: Prof. Dr. Khairun Azizi Mohd. Azizli
Deposited On:13 Dec 2012 11:39
Last Modified:19 Jan 2017 08:23

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