Computer Simulation of the Aerodisperse Systems Hydrodynamics in Granulation and Drying Apparatus

Computer Simulation of the Aerodisperse Systems Hydrodynamics in Granulation and Drying Apparatus

Artem Artyukhov (Sumy State University, Ukraine), Nadiia Artyukhova (Sumy State University, Ukraine) and Jan Krmela (Alexander Dubcek University of Trencin, Slovakia)
DOI: 10.4018/978-1-5225-7138-4.ch010

Abstract

The chapter presents validation of the selection criteria for the construction of the granulation and drying equipment. New forms of the organization of the flows motion in a fluidized bed regime are offered. The steering mechanisms for the motion and the residence time of the disperse phase in a workspace of the apparatus are described. The results of the simulation of the hydrodynamic conditions for the motion of the directional gas flow and the two-phase aerodisperse system are presented. Based on the simulation results, various constructions of the apparatus components are offered. The well-minded construction of the workspace of the apparatus helps to achieve optimized consumption of the heating agent and the minimal residence time of the disperse phase in the apparatus. The computer simulation allowed the authors to offer an algorithm of the optimization calculations of the granulation and drying equipment. New constructive solutions to perform the granulation and the drying processes in the devices with a directional fluidized bed are offered.
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Background

The devices with active hydrodynamic regimes are widely used in the chemical engineering to process solid disperse materials in the gas flow. Classification, separation, thermal treatment, drying and granulation can be the target processes in such devices (Dvornikov & Belousov, 2011; Kaewklum, Kuprianov, & Douglas, 2009; Volchkov, Nikolaev, Kustod, Nikolaev, & Tarovatyu, 2013; Voynov, Nikolaev, Kustod, Nikolaev, & Tarovatyu, 2008).

Key Terms in this Chapter

Drying: A mass transfer process consisting of the removal of water or another solvent by evaporation from a solid.

Granulation: The act or process of forming into grains or granules.

Navier-Stokes Equations: The equations that describe the motion of viscous fluid substance.

Fluidized Bed: A physical phenomenon occurring when a quantity of a solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause a solid/fluid mixture to behave as a fluid.

Hydrodynamics: A branch of physics that deals with the motion of fluids (gases) and the forces acting on solid bodies immersed in fluids (gases) and in motion relative to them.

Computational Model: A mathematical model in computational science that requires extensive computational resources to study the behavior of a complex system by computer simulation.

Reynolds-Averaged Navier-Stokes Equations: The time-averaged equations of motion for fluid flow.

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