Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction

被引：37
|
作者：
Zhang, Liangzhe [1 ]
Tonks, Michael R. [1 ]
Millett, Paul C. [1 ]
Zhang, Yongfeng [1 ]
Chockalingam, Karthikeyan [1 ]
Biner, Bulent [1 ]
机构：
[1] Idaho Natl Lab, Fuels Modeling & Simulat Dept, Idaho Falls, ID 83415 USA
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2012年 / 56卷
关键词：
Phase-field; Soret effect; Pore migration; Thermal conductivity; SINTERED URANIUM DIOXIDE; COLUMNAR GRAIN GROWTH; MICROSTRUCTURE EVOLUTION; VOID MIGRATION; FUEL RODS; SIMULATION; KINETICS;
D O I：
10.1016/j.commatsci.2012.01.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pore migration in a temperature gradient (Soret effect) is investigated by a phase-field model coupled with a heat transfer calculation. Pore migration is observed towards the high temperature domain with velocities that agree with analytical solution. Due to the low thermal conductivity of the pores, the temperature gradient across individual pores is increased, which in turn, accelerates the pore migration. In particular, for pores filled with xenon and helium, the pore velocities are increased by a factor of 2.2 and 2.1, respectively. A quantitative equation is then derived to predict the influence of the low thermal conductivity of pores. Published by Elsevier B. V.
引用
收藏
页码：161 / 165
页数：5
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