Investigation of the Hydrodynamics of Cylindrical Fluidized Bed

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

ECMCONF01_051

تاریخ نمایه سازی: 5 آبان 1397

Abstract:

The main purpose of this work is to find a new numerical model that is capable of investigating the minimum fluidization velocity in a gas-solid bed over a broad range of particle diameters and particle densities. In the present work, CFD simulation of a cylindrical gas-solid fluidized bed has been carried out using Discrete Phase Model. Different drag correlations were examined to simulate the momentum between phases.Comparing the numerical values with the experimental values of the minimum fluidization velocity indicates that the drag model of Cheremisinoff and Gupta has the least deviation, so it is suitable for modeling the drag forces of spherical particles. Experimental studies were carried out using a 1. 07 cm cylindrical bed. The ranges of particles diameter and density vary from 1.μm to 1.mm and 6 to 67.. kg.m(-3), respectively.Results showed that by 27 percent enhancement in diameter and density of particles, the minimum fluidization velocity increases 71 and 29 percent, respectively. The numerical results are in a very good agreement with experimental data within an average error of 66.

Authors

Maral Mehdizad

Department of Mechanical Engineering, University of Guilan, Rasht, ۱۱۷۴۹۷۱۹۱۱, Iran

Ramin Kouhikamali

Department of Mechanical Engineering, University of Guilan, Rasht, ۱۱۷۴۹۷۱۹۱۱, Iran