Characteristics of purge gas flow in regular and random closed packed pebble beds through CFD-DEM

被引：0
|
作者：
Kashoudhan, Shreyaksh [1 ]
Patel, Rishabh [1 ]
Desu, Raghuram Karthik [1 ]
Kaushik, P. [1 ]
机构：
[1] Natl Inst Technol Tiruchirappalli, Dept Mech Engn, Tiruchirappalli 620015, Tamil Nadu, India
来源：
FUSION ENGINEERING AND DESIGN | 2024年 / 201卷
关键词：
Pebble bed; Breeder reactor; DEM; CFD; Purge gas flow; EFFECTIVE THERMAL-CONDUCTIVITY; SIZE DISTRIBUTIONS; SIMULATION; CONTAINERS; PREDICTION; BLANKET; WALL;
D O I：
10.1016/j.fusengdes.2024.114301
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The flow characteristics of the purge gas in fusion pebble beds play an essential role in the robust design of fusion breeder units. Various factors, viz. packing fraction, pebble size and distribution, and packing structure, influence the flow characteristics. Recent investigation in pebble packing in breeder units has shown to achieve near to regular closed through various filling strategies viz. using slender containers, vibration, etc. Hence, the influence of the packing structure of mono-sized pebbles on purge gas flow is analyzed for regular and random closed packing using Discrete Element Modeling (DEM) and Computational fluid dynamics (CFD). The work investigates the relation between the variation of packing fraction (or void distribution) and the velocity and pressure characteristics of the purge gas flow. The variation of pressure drop and velocity variation is investigated for low-velocity purge gas flow. The macroscopic pressure drop along the flow length is compared with the semi-empirical relations viz. Ergun and Kozney-carmen equation.
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页数：7
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