2026-10-14T14:09:20Z https://www.scidb.cn/oai

10.57760/sciencedb.04169 2022-10-24T10:41:42Z

2022-10-24 A DEM-CFD numerical model for the prediction of the effective thermal conductivity of pebble beds with contact conduction doi:10.57760/sciencedb.04169 en Pebble beds are main schemes for tritium breeding zones in the solid blanket for fusion reactors. The effective thermal conductivity of pebble beds (keff ) is an important thermal property used in the thermal hydraulic design of solid blankets. In this study, a 3D DEM-CFD one-way coupling method considering contact conduction is applied to analyze the influence of solid contact conduction and solid-fluid-solid conduction on the effective thermal conductivity of pebble beds. The current numerical model gives a keff consistent with experimental data in a wide range of solid-to-fluid conductivity ratio k k s f / from 1 to 10,000. It can be concluded that when the k k s f / is more than 20, contact conduction should be taken into account to make a good prediction for keff . Blanket; Pebble beds; DEM-CFD; Effective thermal conductivity; Contact conduction; Solid-to-fluid conductivity ratio Cong Wang Lei CHEN Songlin Liu PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1016/j.fusengdes.2019.111257 Science Data Bank