CAJ | 학술논문

针对裂隙岩体渗流传热问题，用解析方法，比较2种不同岩石基质与裂隙水界面热交换假设下的计算结果，对一般裂隙岩体，2种假设下的计算结果相同。基于离散裂隙网络模型的思想，在商业有限元软件COMSOL中实现一种计算已知裂隙网络的裂隙岩体渗流和传热过程的数值方法，该方法可以同时计算岩石基质与裂隙中的渗流和传热过程及二者间的交换，并与解析解比较进行验证。用该方法对一随机生成的二维裂隙岩体进行计算，得到的出口温度曲线，可以反映裂隙岩体渗流传热的早期热突破和长尾效应等特点，并分析岩石基质渗透率、热传导系数的不同取值对裂隙岩体渗流和传热过程的影响。
침대렬극암체삼류전열문제，용해석방법，비교2충불동암석기질여렬극수계면열교환가설하적계산결과，대일반렬극암체，2충가설하적계산결과상동。기우리산렬극망락모형적사상，재상업유한원연건COMSOL중실현일충계산이지렬극망락적렬극암체삼류화전열과정적수치방법，해방법가이동시계산암석기질여렬극중적삼류화전열과정급이자간적교환，병여해석해비교진행험증。용해방법대일수궤생성적이유렬극암체진행계산，득도적출구온도곡선，가이반영렬극암체삼류전열적조기열돌파화장미효응등특점，병분석암석기질삼투솔、열전도계수적불동취치대렬극암체삼류화전열과정적영향。
For the problem of flow and heat transfer in fractured rocks,two hypotheses of heat exchange between rock matrix and fluid in the fracture are compared analytically. It is found that the same result will be obtained for that the fracture aperture is small in general. A discrete fracture network model is realized in commercial finite element software COMSOL for the computation of flow and heat transfer in fractured rock. Both fluid flow and heat transfer in rock matrix and fracture can be calculated in this model,as well as fluid and heat exchange between them. The results are validated by comparing with analytical solutions. Finally,the model is used to simulate a randomly generated fracture network to study the characteristics of flow and heat transfer in fractured rock;and reasonable results are obtained.