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DOI	10.1002/ppp.575
	The 'thermal semi-conductor' effect of crushed rocks
	Cheng Guodong; Lai Yuanming; San Zhizhong; Jiang Fan
发表日期	2007
ISSN	1045-6740
EISSN	1099-1530
起始页码	151
结束页码	160
卷号	18 期号:2
英文摘要	Coarse rock layers are widespread in periglacial environments and can lower the temperature of underlying ground. We show that the cooling effect of closed and sloping rock layers is in the form of Rayleigh-Benard convection, while that of open and inclined rock layers is via the 'chimney effect' and wind-forced convection. Cooling has been observed in numerical simulations, laboratory models and field mock-up experiments. Coarse rocks were widely used in the construction of the Qinghai-Xizang Railroad and temperature monitoring of their performance indicates that they do have a cooling effect on embankments. The advantages of utilising such materials are many, including high efficiency, ease of installation, environmental friendliness and relatively low cost. It is recommended that they be used in engineering projects in sensitive permafrost areas as a cooling agent and/or a countermeasure against possible global warming. Copyright (C) 2007 John Wiley & Sons, Ltd.
英文关键词	crushed-rock layer; Rayleigh-Benard convection; chimney effect; wind-forced convection; global warming
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geology
WOS关键词	BOUNDARY-CONDITIONS ; PERMAFROST AREAS ; POROUS LAYER ; EMBANKMENTS ; CONVECTION ; PLATEAU ; FLOW
WOS记录号	WOS:000247244200004
来源期刊	PERMAFROST AND PERIGLACIAL PROCESSES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239540
作者单位	Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China; Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Cheng Guodong,Lai Yuanming,San Zhizhong,et al. The 'thermal semi-conductor' effect of crushed rocks[J],2007,18(2).
APA	Cheng Guodong,Lai Yuanming,San Zhizhong,&Jiang Fan.(2007).The 'thermal semi-conductor' effect of crushed rocks.PERMAFROST AND PERIGLACIAL PROCESSES,18(2).
MLA	Cheng Guodong,et al."The 'thermal semi-conductor' effect of crushed rocks".PERMAFROST AND PERIGLACIAL PROCESSES 18.2(2007).