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Theoretical and Experimental Study of Gas-Solid Fluidized Beds Dpm Approach

Banaei, Mohammad | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42749 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. Because of the importance of gas-solid fluidized beds in industrial plants, many efforts have been done for predicting their behavior up to now. Generally, there are two major attitudes for describing and simulating the hydrodynamics of fluidized beds, Eulerian-Eulerian methods and Eulerian-Lagrangian metods. Both of these approaches have their own advantages and disadvantages and a lot of studies have been done to understand the nature of gas-solid fluidized beds with aid of these models. Due to fewer presumptions in the basic structure of Eulerian-Lagrangian methods such as DEM in comparison with Eulerian-Eulerian methods like TFM, these models can predict the hydrodynamics of fluidized bed much better. Usually in the simulation of gas-solid fluidized beds, the lift force is neglected and in this work it is tried to highlight the importance of the shear induced lift force in pressurized gas-solid fluidized beds and it is also mentioned the effect of this force on some quantitative and qualitative parameters. Moreover, it is tried to demonstrate the difference of three mixing indices and their faults. Finally, the effect of pressure on the way of gas-solid contact and the mixing of particles were investigated
  9. Keywords:
  10. Solid-Gas Fluidized Bed ; High Pressure ; Mixing Process ; Lift Force ; Discrete Particle Model (DPM)

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