Voidage correction method for DEM study of 3D pebble flows in a bed of cycloidal base
Source abstract
Abstract
Voidage (porosity or void fraction) in packed particles (or pebbles) is of fundamental importance in calculating the pressure drop, obtaining the drag, predicting the bed permeability, estimating the neutron streaming, etc. For the case when particles are deformed, a method of voidage correction during the packing state is proposed using a Discrete Element Method (DEM) simulation of 3D pebble flow inside a bed of cycloidal base. A function to evaluate the remaining volume of a pebble intercepted by horizontal and vertical planes is proposed for voidage calculation. After that, the process of solving voidage distribution is provided in detail. Using this method, the voidage inside the cycloidal-base pebble bed is obtained to refer to reported similar data for validation. This method can be potentially used for dynamical voidage calculation in CFD-DEM simulation which can get suitable voidage distribution after the correction.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Granular flow and fluidized beds · Lattice Boltzmann Simulation Studies · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Void fraction distribution in beds of spheres10.1002/aic.690080319 ↗
2. Flow characteristics analysis of purge gas in unitary pebble beds by CFD simulation coupled with DEM geometry model for fusion blanket10.1016/j.fusengdes.2016.12.003 ↗
3. Pebble bed nuclear reactor structure study: A comparison of the experimental and calculated void fraction distribution10.1016/j.pnucene.2018.03.006 ↗
4. Influence of material properties on voidage of numerically generated random packed beds10.1016/j.ces.2020.116406 ↗
5. Radial porosity distribution in cylindrical beds packed with spheres10.1016/0032-5910(83)85022-0 ↗
6. Influence of confining wall on pressure drop and particle-to-fluid heat transfer in packed beds with small D/d ratios under high Reynolds number10.1016/j.ces.2019.115200 ↗
7. DEM simulations of vibrated sphere packings in slender prismatic containers10.1016/j.powtec.2021.06.033 ↗
8. Assessment of performing experimental investigation on a pebble bed modular reactor (PBMR) as a static packed bed approximation10.1016/j.anucene.2016.11.020 ↗
9. Implementation of radial porosity and velocity distribution in a reactor model for heterogeneous catalytic gasphase reactions (TORUS-Model)10.1016/0009-2509(90)80088-V ↗
10. Experimental and numerical study of coarse particle conveying in the small absorber sphere system: Overview and some recent CFD-DEM simulations10.1016/j.nucengdes.2019.110420 ↗
11. A review of recent development for the CFD-DEM investigations of non-spherical particles10.1016/j.powtec.2022.117972 ↗
12. Heat transfer from wall to dense packing structures of spheres, cylinders and Raschig rings10.1016/j.cej.2020.127994 ↗
13. Radial void fraction distributions in randomly packed fixed beds of uniformly sized spheres in cylindrical containers10.1016/0032-5910(92)80045-X ↗
14. A simple method for determining sphere packed bed radial porosity10.1016/j.powtec.2012.06.013 ↗
15. Heat transfer modelling in Discrete Element Method (DEM)-based simulations of thermal processes: Theory and model development10.1016/j.pecs.2020.100847 ↗
16. Radial voidage variation in randomly-packed beds of spheres of different sizes10.1111/j.2042-7158.1966.tb07980.x ↗
17. Radial porosity variations in packed beds10.1002/aic.690040415 ↗
18. Effect of two-group void fraction covariance correlations on interfacial drag predictions for two-fluid model calculations in large diameter pipes10.1007/s42757-022-0138-6 ↗
19. Flow past a single stationary sphere, 2. Regime mapping and effect of external disturbances10.1016/j.powtec.2019.04.032 ↗
20. Pressure drop investigations in packings of arbitrary shaped particles10.1016/j.powtec.2014.11.001 ↗
21. Multi-scale numerical simulation of fluidized beds: Model applicability assessment10.1016/j.partic.2022.11.011 ↗
22. Analytic modeling of heat transfer to vertical dense granular flows10.1115/1.4045311 ↗
23. Numerical study of mixing pebble flow with different density in circulating packed bed10.1016/j.anucene.2019.03.020 ↗
24. A smoothed void fraction method for CFD-DEM simulation of packed pebble beds with particle thermal radiation10.1016/j.ijheatmasstransfer.2017.10.123 ↗
25. Particle-scale investigation of thermal radiation in nuclear packed pebble beds10.1115/1.4039913 ↗
26. Injection of gas–liquid jets into gas–solid fluidized beds: A review10.1016/j.partic.2022.08.014 ↗
27. Experimental investigation on gas-solid hydrodynamics of coarse particles in a two-dimensional spouted bed10.1016/j.powtec.2016.11.024 ↗
28. Pebble flow in the HTR-PM reactor core by GPU-DEM simulation: Effect of friction
29. Semi-resolved CFD-DEM simulation of fine particle migration with heat transfer in heterogeneous porous media10.1016/j.ijheatmasstransfer.2022.123349 ↗