热固耦合下裂隙产状对导热系数影响的模拟分析  

Simulation analysis for influence of fracture occurrence on thermal conductivity under thermal-solid coupling

作　　者：渠成堃[1] 周辉[1] 任振群[2] 程文武[2] QU Cheng-kun ZHOU Hui REN Zhen-qun CHENG Wen-wu(State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China Jining III Coal Mine, Yanzhou Coal Company, Jining 273500, China)

机构地区：[1]中国科学院岩土力学研究所岩土力学与工程国家重点试验室,武汉430071 [2]兖州煤业集团济宁三号煤矿,山东济宁273500

出　　处：《沈阳工业大学学报》2017年第2期219-224,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(51209085;51579093;51479193)

摘　　要：为了研究裂隙产状对岩石导热系数的影响,通过模拟立方定律建立了裂隙产状与导热系数间的关系.利用多场耦合分析软件Comsol Multiphysics建立四种不同的裂隙几何模型,施加温度边界条件后,得到了不同裂隙产状下的模型整体导热系数.结果表明:裂隙对热传导有明显的阻碍效果,增大裂隙开度,模型整体导热系数呈幂函数形式减小;增大裂隙倾角,导热系数呈线性增长规律;减小裂隙数量,增大裂隙表面粗糙度,导热系数呈现增大趋势.In order to study the influence of fracture occurrence on the thermal conductivity,the relationship between the fracture occurrence and thermal conductivity was established through stimulating the cubic law.With the multi-field coupling analysis software Comsol Multiphysics, four different fracture geometry models were established. After the thermal boundary conditions were added,the thermal conductivities of whole model under different fracture occurrences were obtained. The results showthat the fracture has obvious blocking effect on the thermal conduction. When the fracture aperture increases,the thermal conductivities of whole model obviously decrease in the form of power function. With increasing the fracture angle,the thermal conductivities will linearly increase. With decreasing the fracture number and increasing the fracture surface roughness,the thermal conductivities showan increasing trend.

关 键 词：热固耦合 高放废料处置 裂隙 表面粗糙度 立方定律 导热系数 多场耦合分析软件 数值模拟 

分 类 号：TU45[建筑科学—岩土工程]