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

Abstract

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
1041265
Report Number(s):
INL/JOU-11-23842
Journal ID: ISSN 0927-0256; TRN: US1202624
DOE Contract Number:  
DE-AC07-05ID14517
Resource Type:
Journal Article
Resource Relation:
Journal Name: Computational Materials Science; Journal Volume: 56
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; ANALYTICAL SOLUTION; HEAT TRANSFER; HELIUM; SIMULATION; TEMPERATURE GRADIENTS; THERMAL CONDUCTION; THERMAL CONDUCTIVITY; XENON; Phase field; Pore; Soret Effect; Thermal conductivity

Citation Formats

Liangzhe Zhang, Michael R Tonks, Paul C Millett, Yongfeng Zhang, Karthikeyan Chockalingam, and Bulent Biner. Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction. United States: N. p., 2012. Web. doi:10.1016/j.commatsci.2012.01.002.
Liangzhe Zhang, Michael R Tonks, Paul C Millett, Yongfeng Zhang, Karthikeyan Chockalingam, & Bulent Biner. Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction. United States. doi:10.1016/j.commatsci.2012.01.002.
Liangzhe Zhang, Michael R Tonks, Paul C Millett, Yongfeng Zhang, Karthikeyan Chockalingam, and Bulent Biner. Sun . "Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction". United States. doi:10.1016/j.commatsci.2012.01.002.
@article{osti_1041265,
title = {Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction},
author = {Liangzhe Zhang and Michael R Tonks and Paul C Millett and Yongfeng Zhang and Karthikeyan Chockalingam and Bulent Biner},
abstractNote = {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.},
doi = {10.1016/j.commatsci.2012.01.002},
journal = {Computational Materials Science},
number = ,
volume = 56,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2012},
month = {Sun Apr 01 00:00:00 EDT 2012}
}