文献类型：期刊文献

英文题名：Convective cooling/heating induced thermal stresses in a fluid saturated porous medium undergoing local thermal non-equilibrium

作者：He, L. -W.[2];Jin, Z. -H.[1];Zhang, Y.[2]

机构：[1]Univ Maine, Dept Mech Engn, Orono, ME 04469 USA;[2]E China Univ Sci & Technol, Sch Mech & Power Engn, MOE Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2012

卷号：49

期号：5

起止页码：748

外文期刊名：INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

收录：;EI(收录号：20120414718505);WOS:【SCI-EXPANDED(收录号:WOS:000300919800005)】；

语种：英文

外文关键词：Thermo-poroelasticity; Local thermal non-equilibrium; Convective cooling/heating; Pore pressure; Thermal stress; Porous medium

摘要：Local thermal non-equilibrium (LINE) may have profound effects on the pore pressure and thermal stresses in fluid saturated porous media under transient thermal loads. This work investigates the temperature, pore pressure, and thermal stress distributions in a porous medium subjected to convective cooling/heating on its boundary. The LINE thermo-poroelasticity equations are solved by means of Laplace transform for two fundamental problems in petroleum engineering and nuclear waste storage applications, i.e., an infinite porous medium containing a cylindrical hole or a spherical cavity subjected to symmetrical thermo-mechanical loads on the cavity boundary. Numerical examples are presented to examine the effects of LINE under convective cooling/heating conditions on the temperature, pore pressure and thermal stresses around the cavities. The results show that the LTNE effects become more pronounced when the convective heat transfer boundary conditions are employed. For the cylindrical hole problem of a sandstone formation, the thermally induced pore pressure and the magnitude of thermal stresses are significantly higher than the corresponding values in the classical poroelasticity, which is particularly true under convective cooling with moderate Biot numbers. For the spherical cavity problem of a clay medium, the LTNE effect may become significant depending on the boundary conditions employed in the classical theory. (C) 2011 Elsevier Ltd. All rights reserved.