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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2000

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A Two-dimensional Superheated Steam Impinging Stream Dryer: A Computational Model

Mujumdar A., Hosseinalipour S., Devahastin S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2000

Vol. 48, nr 3

287-299

A computational study was performed to predict the drying performance of a novel two-dimensional impinging stream dryer using superheated steam as the drying medium. The dryer is basically a flash dryer consisting of an opposing jet configuration. Assuming constant rate period drying kinetics, the drying behaviour of superheated steam-particle mixtures flowing in a turbulent two-phase flow is modelled by solving the coupled mass, momentum and energy conservation equations along with a turbulence model for the gas-particle flow. The effects of various operating parameters on the performance of the impinging stream dryer are investigated and discussed. It is evident from the simulation that a considerable amount of moisture can be removed even over a short overall residence time of the particles in the impinging stream system.