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首页> 外文期刊>International Journal of Heat and Mass Transfer >A new model to determine the thermal conductivity of fine-grained soils
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A new model to determine the thermal conductivity of fine-grained soils

机译：确定细粒土壤热导率的新模型

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摘要

In the study, a three-parameter model was presented to calculate the thermal conductivity at full range of degree of saturation (S) for fine-grained soils based on the Fredlund and Xing model and the normalized thermal conductivity method. Three parameters (a, b, c) of the new model are determined by two equations and a measured point at a certain S. Two equations were obtained by the correlations between the parameters a, b, c and the basic properties of 30 Canadian soils by regression analysis. Moreover, the relationship between the thermal conductivity and S at full range of S was defined as the thermal conductivity curve (TCC) and was divided into 3 regions for the improvement of the calculation result. According to the sensitivity analysis, it is found that the calculated TCC is the most reliable when a point is measured in the Region 2. In addition, the new calculation model was also verified by 6 Chinese soils, suggesting the new model could present a good calculation result (R-2 = 0.97) for the TCC. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在研究中，基于Fredlund和Xing模型以及归一化导热系数方法，提出了一个三参数模型来计算全范围饱和度（S）的导热系数。新模型的三个参数（a，b，c）由两个方程和在某个S处的测量点确定。两个参数由参数a，b，c与30种加拿大土壤的基本性质之间的相关性得出。通过回归分析。此外，将在整个S范围内的热导率与S之间的关系定义为热导率曲线（TCC），并将其分为3个区域，以改善计算结果。通过敏感性分析，发现在2区测量一个点时，计算出的TCC是最可靠的。此外，新的计算模型也得到了中国6种土壤的验证，表明该新模型具有很好的可靠性。 TCC的计算结果（R-2 = 0.97）。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 作者

    Bi Jun; Zhang Mingyi; Chen Wenwu; Lu Jianguo; Lai Yuanming;

  • 作者单位

    Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Three-parameter model; Thermal conductivity; Fine-grained soils; Regression analysis; Sensitivity analysis;

    机译：三参数模型导热系数细粒土回归分析灵敏度分析;

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