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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received August 5, 2022
Accepted April 26, 2023
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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DEM-CFD Analysis of Fluid Flow in Packed Bed Under the Small Column-to-Particle-Diameter Ratios
Abstract
In this study, a novel three-dimensional DEM-CFD numerical method was used to simulate the void fraction, pressure drop,
velocity, and local fl ow in the packed bed under the small column-to-particle-diameter ( D / d ) ratios. The pseudo-continuum
model method is used in the interior of particles, and for the simulation of the fl uid outside the particles, the models are
established based on DEM to avoid the wall eff ect. The simulation results of void fraction and pressure drop show that the
void fractions generated by the DEM method are consistent with the ones calculated from the empirical correlations; and
the empirical correlations used for pressure drop in this work are basically consistent with the results of the pressure drop
predicted by DEM-CFD method. The simulation results of velocity and local fl ow show that velocity distribution is related
to the void fraction distribution; the radial velocity distribution depends mainly on the structure of the packed bed and is
independent of the inlet velocity; and the velocity uniformities of fl uid fl ow are improved with the increasing of D / d ratio.
