Granular flow fields in vertical high shear mixer granulators | Zendy

Ng B. H. | Zendy; Kwan C. C. | Zendy; Ding Y. L. | Zendy; Ghadiri M. | Zendy; Fan X. F. | Zendy; Parker D. J. | Zendy

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Granular flow fields in vertical high shear mixer granulators

Author(s) -

Ng B. H.,

Kwan C. C.,

Ding Y. L.,

Ghadiri M.,

Fan X. F.,

Parker D. J.

Publication year - 2008

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.11389

Subject(s) - mechanics , conical surface , particle (ecology) , materials science , particle density , mixing (physics) , frustum , dispersion (optics) , flow (mathematics) , granular material , composite material , physics , engineering , optics , mechanical engineering , thermodynamics , geology , oceanography , quantum mechanics , volume (thermodynamics)

This study aims to elucidate some basic features of the granular flow field in a conical frustum‐shaped vertical high shear mixer granulator by using the Positron Emission Particle Tracking technique. The tested range of particle size (d 50 = 23, 43, and 60 μm) and shape as quantified by the angle of internal friction (26° and 38°) have a negligible effect on the granular flow field in the mixer granulator. Density of particle imposes great influence on the flow field where reducing density from 2600 to 700 kg m −3 increase the tangential velocity by 1.95 time. Decreasing fill level from 3.5 to 0.9 kg increases the tangential velocity by a factor of 1.19. No obvious discrepancy in the solids motion is seen between machines of 1 and 5 L capacity and both machines have similar mixing and dispersion with constant tip speed criterion. © 2007 American Institute of Chemical Engineers AIChE J, 2008

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