Numerical investigation of the effect of bed height on minimum fluidization velocity of cylindrical fluidized bed

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Minimum fluidization velocity is one of the most important properties to characterize a bed, differentiating between a packed bed and a fluidized bed. Numerical simulation for 4 different ratios of initial bed heights (H) to base diameter (D), were performed; viz. 0.5, 1, 2 and 3. Glass beads of density 2600kg/m3 and with an average diameter of 550μm were used for all the simulations. Simulations were performed using the commercial CFD software, STAR-CCM+. The minimum fluidization velocity was identified by measuring pressure drop across the entire domain. The predicted minimum fluidization velocity remains constant for the different H/D ratios, proving that it is independent of bed height for a cylindrical bed.

Author Name: 
Ajay M R
Aditya Karnik
Conference Location: 
Hyderabad , India
Conference Date: 
Monday, December 10, 2012
Conference Name: 
International Congress on Computational Mechanics and Simulation (ICCMS)