| 二维裂隙岩体渗流传热的离散裂隙网络模型数值计算方法 |
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| 引用本文： | 陈必光,宋二祥,程晓辉.二维裂隙岩体渗流传热的离散裂隙网络模型数值计算方法[J].岩石力学与工程学报,2014,33(1):43-51. |
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| 作者姓名： | 陈必光 宋二祥 程晓辉 |
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| 作者单位： | (1. 清华大学 土木工程系，北京 100084；2. 清华大学 土木工程安全与耐久教育部重点实验室，北京 100084) |
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| 基金项目： | 国家自然科学基金资助项目(41272279) |
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| 摘 要： | 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。
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| 关 键 词： | 岩石力学裂隙岩体渗流传热离散裂隙网络有限元 |
| 收稿时间： | 2013-02-20; |
A NUMERICAL METHOD FOR DISCRETE FRACTURE NETWORK MODEL FOR FLOW AND HEAT TRANSFER IN TWO-DIMENSIONAL FRACTURED ROCKS |
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| CHEN Biguang,SONG Erxiang,CHENG Xiaohui,.A NUMERICAL METHOD FOR DISCRETE FRACTURE NETWORK MODEL FOR FLOW AND HEAT TRANSFER IN TWO-DIMENSIONAL FRACTURED ROCKS[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(1):43-51. |
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| Authors: | CHEN Biguang SONG Erxiang CHENG Xiaohui |
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| Affiliation: | (1. Department of Civil Engineering，Tsinghua University，Beijing 100084，China；2. Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education，Tsinghua University，Beijing 100084，China) |
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| Abstract: | 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. |
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| Keywords: | rock mechanics fractured rock flow and heat transfer discrete fracture network(DFN) finite elements |
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