WU Li-zhou,HUANG Run-qiu.Numerical Solution of One-dimensional Coupled Heat and Moisture in Unsaturated Soils[J].Research of Soil and Water Conservation,2011,18(04):211-213.
一维非饱和土热-湿耦合的数值解
- Title:
- Numerical Solution of One-dimensional Coupled Heat and Moisture in Unsaturated Soils
- Keywords:
- unsaturated soil; coupled heat and moisture; water content; temperature; numerical solution
- 分类号:
- S152.9
- 摘要:
- 非饱和土热-湿耦合普遍存在于路基和大坝等工程中。通过一维热-湿耦合控制方程，采用FlexPDE（Par-tial differential equation）软件对非饱和土热-湿耦合进行分析，研究非饱和土热-湿耦合作用下热传导及含水量分布的特征，探索重力对热-湿耦合的影响。结果表明：耦合效应对含水量分布的作用是明显的，在入渗流量较小时，重力对非饱和土的热-湿耦合的影响非常微弱；等温下气扩散系数对非饱和土热-湿耦合的影响可忽略。
- Abstract:
- Coupled heat and moisture in unsaturated soils can be found in many engineering, such as roadbed and dam. The system of partial differential equations governing the coupled processes of heat conduction and moisture transport in a porous medium is given. FlexPDE known as a software is used to analyze heat conduction and moisture distribution over time in uncoupled and coupled conditions. The effect of water content on the heat profile, and influence of gravity on coupled heat and moisture in unsaturated soils are discussed. The numerical results indicate that coupling effect is very remarkable and should be considered. The numerical solutions show that influence of the gravity on moisture distribution is negligible, and that vapor diffusivity has no effect on coupled heat and moisture in unsaturated soils.
参考文献/References:
[1] Lee J, Kim J T, Chung I M, et al.Analytical solution for heat and moisture diffusion in layered materials[J].Canadian Geotechnical Journal, 2010, 47(6):595-608.
[2] 王铁行, 李宁, 谢定义.土体水热力耦合问题研究意义、现状及建议[J].岩土力学, 2005, 26(3):488-493.
[3] 毛雪松, 王秉纲, 胡长顺, 等.冻土路基水热迁移问题的理论模型及数值模拟[J].中外公路, 2006, 26(1):23-26.
[4] 白冰, 刘大鹏.非饱和介质中热能传输及水分迁移的数值积分解[J].岩土力学, 2006, 27(12):2085-2089.
[5] Wu L Z, Zhang L M.Analytical solutions to 1D coupled water infiltration and deformation in unsaturated soils[J].International Journal for Numerical and Analytical Methods in Geomechanics, 2009, 33(6):773-790.
[6] 张玉军.核废料处置概念库近场热-水-应力耦合模型及数值分析[J].岩土力学, 2007, 28(1):17-22.
[7] Basha H A, Selvadurai A P S.Heat-induced moisture transport in the vicinity of a spherical heat source[J].International Journal for Numerical and Analytical Methods in Geomechanics, 1998, 22(12):969-981.
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备注/Memo
收稿日期:2011-2-18;改回日期:2011-3-29。
基金项目:国家自然科学基金委基金项目（40902087）；教育部科学技术研究重点项目（110186）；教育部博士点新教师基金（20095122120007）；四川省杰出青年学术技术带头人培育计划（2010JQ0034）
作者简介:吴礼舟（1975- ），男，副教授，博士，主要从事岩土工程的科研教学工作。E-mail：wulizhoucn@yahoo.com.cn