Computational fluid dynamic simulation of fluid flow in a rotating packed bed

A review on computational fluid dynamic simulation for rotating packed beds

“…Yang et al 41 developed three-dimensional geometry models of RPB (shown in Fig. 4) as a simplification or description of the traditional wire mesh packing type.…”

“…Different from obstacle approximation, porous media simplification uses one of the mathematical models, the porous media model, to describe the packing zone, instead of building a geometric structure. The promising advantages of this approach are wileyonlinelibrary.com/jctb 41 Foursquare obstacles (0.5 × 0.5 mm 2 )…”

“…Hence, this model is a steady-state approximation, although it can provide a reasonable model for the condition that the rotor-stator interaction is relatively weak. 66 Therefore, so far the MRF model is adopted to simulate gas flows in RPBs 26,41,46,50 or multiphase flow in RPBs in which the fluids flow in the stationary zone can be neglected. 48,52 Another approach, the SM model, belongs to the dynamic mesh model which can achieve the moving of the boundaries of a cell zone relative to other boundaries of the zone, and adjusting the mesh accordingly.…”

Modelling of CO2 absorption in a rotating packed bed using an Eulerian porous media approach

“…The reason is that the VOF model requires a very small grid size to capture the droplets and film, so it is not suitable to simulate 3D or large pilot scale RPBs due to computer resource limitations and the simulation time limitations. For example, a 3D model for a small RPB rig with the inner radius of 30 mm, the outer radius of 160 mm and the axial height of 50 mm requires about 1, 071,338 tetrahedral and 26, 190 pyramid grids (Yang et al, 2010) and Guo et al (2017) also suggest about 1.6 million cells in total are required for a 3D wire mesh packing for VOF simulations. However, the Eulerian method can simulate the liquid flow through the whole bed with the appropriate mesh size and with the low requirement of computer resources.…”

Flue‐Gas Desulfurization by Using a HiGee Electric‐Field Device

“…In an RPB, liquid is spread and split into microliquid elements comprising fine droplets, threads, and thin films by centrifugal force generated through rotation of the packed bed. As a result, there is huge turbulence created in the gas and liquid streams flowing through the packing, as well as faster renewal of the gas‐liquid interface, resulting in improved mass‐transfer efficiency . Consequently, RPBs have been widely used in many applications, such as absorption, crystallization, and polymerization .…”