Determination of particle residence time at the walls of gas fluidized beds by discrete element method simulation

摘要: Abstract This paper presents a study of particle residence time near the walls gas fluidized beds by DEM simulation. The simulation experiments were performed in two beds, one 50 mm ×50 cross-section and other 90 ×90 cross-section. particles used 0.5 1 diameter 2650 kg / m 3 density. number was 600,000 500,000 for simulations particles, respectively. advantage this approach is that it enables an unprecedented amount information pertaining to motion individual bed be obtained. These include distribution time, mean contact frequency, distance at walls. Variations with size, velocity, wall position are examined. Significance results modelling particle-to-wall heat transfer highlighted.