气候变化领域集成服务门户(CCPortal): An element free Galerkin method for nonlinear heat transfer with phase change in Qinghai-Tibet railway embankment

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DOI	10.1016/j.coldregions.2006.10.004
	An element free Galerkin method for nonlinear heat transfer with phase change in Qinghai-Tibet railway embankment
	Gao Zhihua; Lai Yuanming; Zhang Mingyi; Qi Jilin; Zhang Shujuan
发表日期	2007
ISSN	0165-232X
EISSN	1872-7441
起始页码	15
结束页码	23
卷号	48 期号:1
英文摘要	Since the element free Galerkin method (EFGM) is based on moving least-squares (MLS) interpolants, it requires only a mesh of nodes and a boundary description, which are beneficial to some problems with the moving boundary conditions, such as the transient temperature field problems with phase change. Because freezing and thawing often takes place in embankments in cold regions, the phase transition must be considered in heat transfer calculation. Therefore, in this paper, the EFGM is presented to solve the thermal problem involving phase change in permafrost embankment. In the calculation, the latent heat is considered using the enthalpy-based method and the essential boundary condition is enforced by the Lagrange multipliers method. The EFGM code has been written in the FORTRAN language for obtaining the numerical solution. The result shows that, compared with the finite element solution, EFGM has more advantages such as better agreement with the observational data, high convergence rate, simple pre-processing and post-processing, etc. in a word, these analyses support the proposition for employing such a method for nonlinear temperature field involving the phase change in the actual railway project on permafrost. (c) 2006 Elsevier B.V. All rights reserved.
英文关键词	nonlinear temperature field; Qinghai-Tibet railway; the element free Galerkin method; Lagrange multiplier method
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	DEPENDENT THERMAL-CONDUCTIVITY ; PERMAFROST REGIONS ; NUMERICAL-SOLUTION ; MESHLESS METHOD
WOS记录号	WOS:000245571400002
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239539
作者单位	Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Gao Zhihua,Lai Yuanming,Zhang Mingyi,et al. An element free Galerkin method for nonlinear heat transfer with phase change in Qinghai-Tibet railway embankment[J],2007,48(1).
APA	Gao Zhihua,Lai Yuanming,Zhang Mingyi,Qi Jilin,&Zhang Shujuan.(2007).An element free Galerkin method for nonlinear heat transfer with phase change in Qinghai-Tibet railway embankment.COLD REGIONS SCIENCE AND TECHNOLOGY,48(1).
MLA	Gao Zhihua,et al."An element free Galerkin method for nonlinear heat transfer with phase change in Qinghai-Tibet railway embankment".COLD REGIONS SCIENCE AND TECHNOLOGY 48.1(2007).