FLUIDIZATION OF NANOPARTICLE AGGLOMERATES IN A FLUIDIZED BED: AN EXPERIMENTAL STUDY AND CFD SIMULATION

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BAHRAMIAN A.; Olazar M.

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Seminar Paper

Paper Information

Seminar: CHEMICAL ENGINEERING CONGRESS AND EXHIBITION
Year:2014 | Issue:8

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Title

FLUIDIZATION OF NANOPARTICLE AGGLOMERATES IN A FLUIDIZED BED: AN EXPERIMENTAL STUDY AND CFD SIMULATION

Author(s)

BAHRAMIAN A. | Olazar M. | Issue Writer Certificate

Keywords

FLUIDIZATION

CFD SIMULATION

SOLID VOLUME FRACTION

NANOPARTICLE AGGLOMERATES

Abstract

HYDRODYNAMICS CHARACTERISTICS OF NANOPARTICLE AGGLOMERATES HAVE BEEN INVESTIGATED IN A FLUIDIZED BED. THE EXPERIMENTAL MEASURMENTS WERE PERFORMED IN A BED CONTAINING SILVER OXIDE DRY POWDER BELONGING TO GROUP B OF GELDART’S CLASSIFICATION WITH AN INITIAL PARTICLE SIZE OF 30 NM. PRESSURE MEASUREMENTS AND AN OPTICAL FIBER TECHNIQUE ALLOWED DETERMINING THE EFFECT OF INITIAL PARTICLES LOADINGS ON THE FLUIDIZATION CHARACTERISTICS AND SOLID VOLUME FRACTION OF PARTICLES. INTERPARTICLE ADHESION FORCES BETWEEN SILVER OXIDE NANOPARTICLES GIVE RISE TO THE FORMATION OF NANOPARTICLE AGGLOMERATES WITH A WIDE PARTICLE SIZE DISTRIBUTION. NUMERICAL SIMULATIONS WERE ALSO PERFORMED TO EVALUATE THE SENSITIVITY OF GAS-SOLID DRAG MODELS. IN ALL SIMULATIONS, AN EULERIAN-EULERIAN TWO FLUID MODEL AND AN AVERAGE PARTICLE SIZE OF 200 MM WAS USED WITH DIFFERENT DRAG MODELS. THE AXIAL PROFILE OF SOLID VOLUME FRACTION HAVE BEEN DETERMINED TO EVALUATE THE SENSITIVITY OF DIFFERENT DRAG MODELS, INCLUDING WEN-YU., GIDASPOW, AND MODIFIED SYAMLAL-O, BRIEN FUNCTIONS. THE SIMULATION RESULTS OBTAINED FOR THE BED EXPANSION RATIO AND MINIMUM FLUIDIZATION VELOCITY SHOW THAT THE MODIFIED SYAMLAL-O’BRIEN DRAG MODEL PROVIDES THE CLOSEST FIT TO THE EXPERIMENTAL DATA.

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APA: Copy

BAHRAMIAN, A., & Olazar, M.. (2014). FLUIDIZATION OF NANOPARTICLE AGGLOMERATES IN A FLUIDIZED BED: AN EXPERIMENTAL STUDY AND CFD SIMULATION. INTERNATIONAL CHEMICAL ENGINEERING CONGRESS AND EXHIBITION. SID. https://sid.ir/paper/916003/en

Vancouver: Copy

BAHRAMIAN A., Olazar M.. FLUIDIZATION OF NANOPARTICLE AGGLOMERATES IN A FLUIDIZED BED: AN EXPERIMENTAL STUDY AND CFD SIMULATION. 2014. Available from: https://sid.ir/paper/916003/en

IEEE: Copy

A. BAHRAMIAN, and M. Olazar, “FLUIDIZATION OF NANOPARTICLE AGGLOMERATES IN A FLUIDIZED BED: AN EXPERIMENTAL STUDY AND CFD SIMULATION,” presented at the INTERNATIONAL CHEMICAL ENGINEERING CONGRESS AND EXHIBITION. 2014, [Online]. Available: https://sid.ir/paper/916003/en

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