Numerical simulation of inlet velocity and geometry effects of on the hydrodynamics of gas-solid turbulent flow in a fluidized bed reactor

علوم کاربردی و محاسباتی در مکانیک

Article 1, Volume 37, Issue 1 - Serial Number 39, April 2025, Pages 1-16   

Document Type: Original Article

DOI: 10.22067/jacsm.2024.87722.1250

Authors

Morteza Rahmanpour^* ; Sina Shenavar; Amir Sorouradin Abadi

Mechanical Engineering Department, Azarbaijan Shahid Madani University, Tabriz, Iran.

Abstract

In this article, turbulent-gas two-phase in a fluidized bed is investigated and solved. In order to study the above effect, a reactor with different shapes and geometries has been considered and the effect of reactor shapes on the expansion volume of the solid bed has been investigated. The fluidized bed reactor is a types of reactors that can be used to perform multiphase chemical reactions, as well as in the field of producing gasoline and other fuels, many polymers such as rubber, vinyl chloride, polyethylene and styrene, nuclear energy units, burning coal, water purification units, The catalytic cracking process is also used as a dryer. In the inclined fluidized bed, the fluid velocity increases, which increases the product recovery and removes the dried product from the bed. The velocity of phases and particles inside the bed also increases and shows changes in the velocity profile of the solid. Increasing the column diameter decreases the axial solids velocity and smaller particle sizes have more discharge. Increasing the height of the bed reduces the static pressure and increases the frictional pressure. For this purpose, computational fluid dynamics is considered as a useful tool and the most likely method for correct prediction and optimization. In the present research, due to the expensiveness of the experimental method and the lack of equipment, numerical solutions were used.

Keywords

Multiphase flows; gas-solid; fluidized bed reactor; turbulent flow; gas dryers

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