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Received March 26, 2017
Accepted July 1, 2017
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Two- and Three-dimensional Analysis on the Bubble Flow Characteristics Using CPFD Simulation
School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, 16419, Korea
dhlee@skku.edu
Korean Chemical Engineering Research, October 2017, 55(5), 698-703(6), 10.9713/kcer.2017.55.5.698 Epub 19 October 2017
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Abstract
Bubble flow characteristics in fluidized beds were analyzed by CPFD simulation. A fluidized bed, which had the size of 0.3 m-ID × 2.4 m-high, was modeled by commercial CPFD Barracuda®. Properties of bed material were dp = 150 μm, ρp = 2,330 kg/m3, and Umf = 0.02 m/s. Gas was uniformly distributed and the range of superficial gas velocity was 0.07 to 0.16 m/s. Two other geometries were modeled. The first was a three-dimensional model, and the other was a two-dimensional model of 0.01 m × 0.3 m × 2.4 m. Bubble size and rising velocity were simulated by axial and radial position according to superficial gas velocity. In the case of three-dimensional model, simulated bubble rising velocity was different from correlations, because there was zigzag motion in bubble flow, and bubble detection was duplicated. To exclude zigzag motion of bubble flow, bubble rising velocity was simulated in the two-dimensional model and compared to the result from three-dimensional model.
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Lim JH, Bae K, Shin JH, Lee DH, Han JH, Lee DH, Korean Chem. Eng. Res., 54(5), 678 (2016)
