In this work particle flow behaviors inside a gas-solid fluidized bed were documented. Spherical and non-spherical particles measuring 1 mm and 0.85-1.18 mm, respectively, were used as test particles. Flow structure, particles size, particle velocity were measured with shadowgrapby a non-intrusive technology. Also presented in this work is a drag model for non-spherical particles expressed in terms of particle sphericity and Reynolds number. The drag model presented here is applicable to a range between 0.48 to 0.68.
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