Simulating Bubble Characteristics in a Fluidized Bed at Elevated Pressures by Lagrangian Approach

Abstract. A numerical simulation was conducted to study the bubble dynamics in a gas-solid fluidized bed at high pressure. The gas phase flow was simulated using continuum theory and the solid phase flow is simulated by discrete element method (DEM). The gas motion was calculated using Navier-Stocks and continuity equations by the SIMPLE method. Effect of the pressure on the bubble rise characteristics such as the bubble shape, the average bubbles diameter and frequency of them were investigated through the bed.