Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction
- 作者：Liangzhe Zhang ; liangzhezhang@gmail.com ; liangzhe.zhang@inl.gov ; Michael R. Tonks ; Paul C. Millett ; Yongfeng Zhang ; Karthikeyan Chockalingam ; Bulent Biner
- 关键词：Phase-field ; Soret effect ; Pore migration ; Thermal conductivity
- 刊名：Computational Materials Science
- 出版年：2012
- 期刊代码：31_09270256
- 类别：et
- 出版时间：April, 2012
- 卷：56
- 期：Complete
- 页码：161-165
- 文件大小：579 K
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.