Numerical Simulation of Bubbling Fluidized Bed Using Smoothed Particle Method and Experimental Verification.

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  • ＳＭＯＯＴＨＥＤ　ＰＡＲＴＩＣＬＥ法を用いた気泡流動層の数値解析と実験結果との比較検討
  • SMOOTHED PARTICLEホウ オ モチイタ キホウ リュウドウソウ ノ スウチ カイセキ ト ジッケン ケッカ ト ノ ヒカク ケントウ

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Abstract

Air and Particle motions in a bubbling fluidized bed are numerically simulated using Smoothed Particle (SP) method for the particle phase. In the SP method, the partial differential equations, which are the governing equations for the flow fields of the particle phase, are transformed to the ordinary differential equations, which are Lagrangian-type equations. The numerical analysis of ordimary differential equations is much easier than that of partial differential equations. Moreover, Lagrangian analysis is suitable for the description of the characteristics of discrete particles. The Navier-Stokes equations and the Lagrangian type equations were simultaneously solved. The corresponding experiments were also performed. It is found that calculated results describe well the experimental instantaneous particle positions, and enable us to know the mechanisms of bubble formation, bubble coalescence and bubble disruption in a bubbling fluidized bed.

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