Study on coupled thermo-hydro-mechanical processes in column bentonite test

doi:10.1007/s12665-017-6942-9

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	Study on coupled thermo-hydro-mechanical processes in column bentonite test
	Feng, Xia-Ting1 ; Pan, Peng-Zhi 1,2; Yan, Fei 1; Wu, Zhen-Hua 1
刊名	ENVIRONMENTAL EARTH SCIENCES
	2017
卷号	76 期号:17 页码:-
关键词	Coupled thermo-hydro-mechanical process Non-isothermal Unsaturated flow Bentonite pellets EPCA(3D) Fast successive relaxation method
ISSN号	1866-6280
DOI	10.1007/s12665-017-6942-9
英文摘要	An unconventional numerical scheme is developed to simulate coupled thermo-hydro-mechanical (THM) processes in partially saturated medium. The non-isothermal, unsaturated fluid flow and mechanical processes are sequentially coupled by updating all the state variables using cellular automaton technique and finite difference method on spatial and temporal scale, respectively. A new cellular automaton updating scheme is proposed by introducing a fast successive relaxation index, which greatly improves the computational efficiency in the simulation of THM coupling process. This is implemented in a self-developed numerical system, i.e., an elasto-plastic cellular automaton (EPCA(3D)), which was used to numerically reproduce the coupled THM behavior of bentonite pellets in a column experiment that was heated up to 140 degrees C firstly and then was hydrated simulating the resaturation of the backfilling. By using the cellular automaton technique in EPCA(3D), the challenging courses of the changing boundary conditions over time and space during the experiment are conveniently implemented. The EPCA(3D) was able to reproduce the main physical processes of the in laboratory column bentonite experiment within the heating and hydration phase. The modeling results for the evolution of temperature, relative humidity, water uptake and axial pressure are consistent with the experimental data in terms of trends and magnitudes, which verifies the realistic simulation with the developed model and contributes to a deeper understanding of the observed phenomena.
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000410817000030
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4135]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines
推荐引用方式 GB/T 7714	Feng, Xia-Ting,Pan, Peng-Zhi,Yan, Fei,et al. Study on coupled thermo-hydro-mechanical processes in column bentonite test[J]. ENVIRONMENTAL EARTH SCIENCES,2017,76(17):-.
APA	Feng, Xia-Ting,Pan, Peng-Zhi,Yan, Fei,&Wu, Zhen-Hua.(2017).Study on coupled thermo-hydro-mechanical processes in column bentonite test.ENVIRONMENTAL EARTH SCIENCES,76(17),-.
MLA	Feng, Xia-Ting,et al."Study on coupled thermo-hydro-mechanical processes in column bentonite test".ENVIRONMENTAL EARTH SCIENCES 76.17(2017):-.