Modelling of 2D Fluidized Beds using the DPM Method and Investigation of the Pressure Effect on Particle-Wall Collision Frequency

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Arjomandi Lari, Mojtaba | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46569 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Molaei Dehkordi, Asghar
Abstract:
In this work, a comprehensive survey on the different methods of modeling fluidized beds was done. Finally, the discrete particle method with soft particle approach was selected as the method of modeling the solid phase. For the gas phase, computational fluid dynamics (CFD) as the method of modeling is used. In order to verify our simulation results for the solid phase, a simulation of a bed with many particles distributed all around the bed was done. At the first second of the simulation, the gas phase flow was truned off and the particles were falling down. The results obtained with this method were verified with the references. For verification of the gas phase, a 2D bed with the gas phase flowing through it was simulated. The obtained simulation results were compared and verified with thosed obtained using the COMSOL software. Finally, the goal parameter was set as frequency of particle-wall collisions. Using many simulations, the effects of operating pressure, inlet gas velocity, particle density, and collisional properties on the parameter were invetigated
Keywords:
Discrete Particle Model (DPM) ; Fluidized Bed ; Computational Fluid Dynamics (CFD) ; Pressure Effect ; Fluidized Bed ; Particles-Wall Collision Frequency ; Inlet Velocity Effect ; Particle Density Effect

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