Abstract
This paper presents a 2D soft-sphere discrete element method (DEM) simulation study of bubble formation in fluidized beds of Geldart Group B powders with and without externally imposed cohesive interparticle force. The effect of interparticle force on bubble formation and bubble characteristics is studied by inducing a single bubble at the centre of the distributor of a 2D bed that contains 36 000 mono-sized particles having a diameter of 500 μ m and density of 1000 kg m - 3 . It is observed that in the presence of externally imposed cohesive interparticle force, the bubble formation process not only requires a higher air velocity for its initiation, but it is also slower when compared to the case with no interparticle force.
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