Experimental researches of thermal diffusivity and conductivity in embankment ballast under periodically fluctuating temperature | |
Sun, BX; Xu, XZ; Lai, YM; Li, DQ; Wang, SJ; Zhang, JZ | |
刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
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2004-04-01 | |
卷号 | 38期号:2-3页码:219-227 |
关键词 | porous media natural convection embankment ballast thermal diffusivity thermal conductivity |
ISSN号 | 0165-232X |
DOI | 10.1016/j.coldregions.2003.11.001 |
通讯作者 | Sun, BX(sbinxiang@263.net) |
英文摘要 | The experimental approach to evaluating the thermal diffusivity and conductivity in the porous ballast was studied. For tight-test and open-test, heat transfer characteristics in porous ballast cylindrical specimens under a periodically fluctuating surface temperature were analyzed. For tight-test, the theoretical and experimental studies show that natural convection may be negligible and heat conduction is the main mechanism of heat transfer. For the slender cylindrical specimen in the tight-test, the damping of temperature amplitudes in the upper part of the porous ballast specimen is in good agreement with the exponential damping. Due to larger lateral conduction and the convective heat transfer boundary at the upper surface in the open-test, the exponential damping of temperature amplitudes with depth is not completely satisfied. The thermal diffusivity and conductivity values in the porous ballast with three gain sizes of 6-8, 4-6 and 2-4 cm. were evaluated by the slender cylindrical specimen in the tight-test. (C) 2004 Elsevier B.V. All rights reserved. |
收录类别 | SCI |
WOS关键词 | FROZEN SOILS ; TIME-SERIES ; CONVECTION ; STABILITY |
WOS研究方向 | Engineering ; Geology |
WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000220338800011 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2556957 |
专题 | 寒区旱区环境与工程研究所 |
通讯作者 | Sun, BX |
作者单位 | 1.Shaoxing Coll Arts & Sci, Dept Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China 2.Chinese Acad Sci, CAREERI, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China 3.Minist Commun, Highway Survey & Design Inst 1, Xian 710068, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, BX,Xu, XZ,Lai, YM,et al. Experimental researches of thermal diffusivity and conductivity in embankment ballast under periodically fluctuating temperature[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2004,38(2-3):219-227. |
APA | Sun, BX,Xu, XZ,Lai, YM,Li, DQ,Wang, SJ,&Zhang, JZ.(2004).Experimental researches of thermal diffusivity and conductivity in embankment ballast under periodically fluctuating temperature.COLD REGIONS SCIENCE AND TECHNOLOGY,38(2-3),219-227. |
MLA | Sun, BX,et al."Experimental researches of thermal diffusivity and conductivity in embankment ballast under periodically fluctuating temperature".COLD REGIONS SCIENCE AND TECHNOLOGY 38.2-3(2004):219-227. |
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