Numerical simulation of pulsed fluidized bed with immersed tubes using DEM–LES coupling method

Hydrodynamic and Mixing Characteristics of Gas–Solid Flow in a Pulsed Spouted Bed

“…5,16,18 The simulated time-averaged airflow velocity vectors showed that the effect of pulsation was to increase the upward momentum and decrease the horizontal air percolation, especially at high pulsation amplitudes and low pulsation frequencies. This led to higher maximum spoutable bed height as reported earlier.…”

High-fidelity simulation of the 3-D full-loop gas–solid flow characteristics in the circulating fluidized bed

“…Based on the validation, the coupling model has been applied to investigate the internal transportation mechanisms of solid phase and the tube erosion in the internally circulating fluidized bed Luo et al, 2013aLuo et al, , 2013bYang et al, 2014aYang et al, , 2014b, in which the internal circulation of solid phase is established by introducing a vertical draft tube or a centrally assigned baffle plate in the bubbling fluidized bed. Besides, the solid mixing in the bubbling fluidized bed (Gui and Fan, 2011) and the hydrodynamics in the fluidized bed with tube bundle (Gui et al, 2008;Gui and Fan, 2009) have been explored. Due to its complex geometrical structure of the CFB, the validation of proposed model is also carried out based on the experimental work of Ibsen et al (2004).…”

Investigation of Flow Behaviors and Bubble Characteristics of a Pulse Fluidized Bed via CFD Modeling

“…[6] Carrot cubes and spent grains from breweries are examples of materials that are not easily fluidized but can be dried under pulsed fluidization. [7] Due to these merits, many research efforts have been devoted to various aspects associated to pulsed fluidization; e.g., hydrodynamic characteristics, [8] mass oscillation [9] and transfer, [10] heat transfer, [11] numerical models [3,12,13] and simulation, [6,14] and many other industrial applications such as drying, [15][16][17][18][19][20] etc. There have been many experimental studies of pulsed fluidized beds, but the theoretical understanding of pulsed fluidized beds is far from complete.…”

“…In addition to experimental work using various probes, topographic, and other imaging techniques used in the investigation of fluidized beds, [8][9][10][11]21] in recent years, computational fluid dynamics (CFD) modeling has evolved into a useful tool to obtain detailed information about the gas-particle flow in spouted beds, fluidized beds, etc. [12][13][14][22][23][24][25] Recent CFD modeling for fluidized beds can be categorized into two methods: one is the so-called two-fluid model (TFM) and the other is the discrete-element method (DEM). In the DEM model, two models, viz.…”