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	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
	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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