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A fully coupled seepage–heat transfer model including a dynamic heat transfer coefficient in fractured rock sample with a single fissure
Geomatics, Natural Hazards and Risk ( IF 4.2 ) Pub Date : 2021-08-09 , DOI: 10.1080/19475705.2021.1950218
Ze Zhang 1 , Shuhong Wang 1 , Tianjiao Yang 1 , Dongsheng Wang 1, 2 , Hong Yin 1
Affiliation  

Abstract

Conventional seepage–heat transfer models in simulating the heat transfer between fluid and rock in fractures mainly involve one-way coupling and do not consider the influence of temperature on the seepage. Moreover, it is an enormous challenge to define parameters of the explicit heat transfer between the rock and fluid. In order to resolve these shortcomings, a two-way fully coupled model of the seepage–heat transfer in the fractured rock was established in the present study. Based on the original geometric structure of the experimental device, combined with the actual engineering scale, the local dynamic heat transfer coefficient of the fractured rock was established, which is related to the fracture aperture, flow velocity and thermal parameters. Then, the proposed model was verified through the experiment and excellent agreement was achieved in this regard. It was found that the dynamic heat transfer coefficient changes the temperature distribution of fluid and rock in the original static heat transfer coefficient fracture system. The proposed model simplifies the parameters required for the calculation of the heat transfer coefficient. These parameters are related to characteristic variables, such as velocity and rock temperature, and can be simply obtained from standard laboratory tests.



中文翻译:

一个完全耦合的渗流-传热模型,包括具有单个裂缝的裂隙岩石样品的动态传热系数

摘要

传统的渗流-传热模型模拟裂缝中流体与岩石之间的传热,主要是单向耦合,没有考虑温度对渗流的影响。此外,定义岩石和流体之间显式热传递的参数是一个巨大的挑战。为了解决这些不足,本研究建立了裂隙岩体渗流传热的双向全耦合模型。在实验装置原有几何结构的基础上,结合实际工程规模,建立了与裂缝孔径、流速和热力参数有关的裂隙岩石局部动态传热系数。然后,通过实验验证了所提出的模型,在这方面取得了很好的一致性。发现动态传热系数改变了原始静态传热系数裂缝系统中流体和岩石的温度分布。所提出的模型简化了计算传热系数所需的参数。这些参数与特征变量有关,例如速度和岩石温度,可以从标准实验室测试中简单地获得。

更新日期:2021-08-09
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