Analysis of Particle Motion in a Rotating Drum Using Kinetic Theory of Granular Flow

  • Kuo, Hsiu-Po (PI)

Project: National Science and Technology CouncilNational Science and Technology Council Academic Grants

Project Details

Abstract

Particle motion in rotating drum can be very different at different operating conditions and hence several granular flow regimes have been reported. When the granular mixtures of different physical properties are tumbled in a rotating drum, particles of different physical properties show different trajectories and may perform segregation, causing spatial non-uniformity. Therefore, the investigation of particle motion is always regarded as one of the most important subjects in chemical engineering and pharmaceutical processing. In this three-year project, we will develop a reliable continuum Eulerian model for granular flow in rotating drums. The model will be experimentally validated and will apply to rotating drum scale up design. In our preliminary study, the widely used Gidaspow kinetic viscosity model failed to predict the dynamic angle of repose of the particles in a rotating drum operating in the rolling mode. This project will provide a new kinetic viscosity model for kinetic theory of granular flow. In the project first year, the kinetic theory of granular flow coupled continuum Eulerian model will be used to simulate single component granular flow in the rotating drum. The best kinetic viscosity values of the granular flows at different operating conditions are fitted by a trial-and-error algorithm. A kinetic viscosity model will then be developed based on the particle diameter and the drum wall shearing. In the second year, the modified continuum Eulerian model will be used to simulate binary mixture segregation in the rotating drum. The simulated results will be validated by the rotating drum segregation experiments using binary mixtures with different interstitial fluids. In the last year, the developed model will be used to simulate the drum systems of different sizes. A drum design scale-up rule will be developed from the different size drum simulations.

Project IDs

Project ID:PB10007-7237
External Project ID:NSC100-2221-E182-048
StatusFinished
Effective start/end date01/08/1131/07/12

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