A NOVEL ANALYTICAL MODEL OF THE EFFECTIVE THERMAL CONDUCTIVITY OF POROUS MATERIALS UNDER STRESS

被引:0
|
作者
Tang, Jiadi [1 ]
Lei, Gang [1 ,2 ]
Li, Xiaodong [1 ]
Zhang, Ling [1 ]
Cheng, Wan [1 ]
Pang, Jiangtao [1 ]
Jiang, Guosheng [1 ]
机构
[1] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
[2] China Univ Geosci, Shenzhen Res Inst, Shenzhen 518063, Peoples R China
基金
中国国家自然科学基金;
关键词
Porous Materials; Effective Stress; Rough Surface; Effective Thermal Conductivity; Analytical Solution;
D O I
暂无
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
With the increasing demand for energy, heat and mass transfer through porous media has been widely studied. To achieve accuracy in studying the behavior of heat transfer, a good knowledge of the effective thermal conductivity (ETC) of porous materials is needed. Because pore structure dominates the ETC of porous materials and effective stress leads to a change in pore structure, effective stress is one of the key influencing factors affecting ETC. In this study, considering the structure of surface roughness and pore size, based on fractal theory, a novel analytical solution at the pore scale for ETC of porous materials under stress conditions is proposed. Furthermore, in this model, capillaries in porous materials saturated with multiple phases have sinusoidal periodically constricted boundaries. The derived ETC model is validated against available experimental data. Moreover, the influences of the effective stress, initial effective porosity, roughness structure characterization, and wetting phase saturation on the ETC are analyzed. Compared with previous models, the rough surfaces of porous materials and the coupling of heat conduction and mechanics are taken into consideration to make the model more reasonable. As a result, this ETC model can better reveal the mechanism of heat conduction in porous media under stress conditions.
引用
收藏
页数:20
相关论文
共 50 条
  • [1] A NOVEL ANALYTICAL MODEL OF THE EFFECTIVE THERMAL CONDUCTIVITY OF POROUS MATERIALS UNDER STRESS
    Tang, Jiadi
    Lei, Gang
    Li, Xiaodong
    Zhang, Ling
    Cheng, Wan
    Pang, Jiangtao
    Jiang, Guosheng
    [J]. FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY, 2023, 31 (08)
  • [2] Analytical Fractal Model for Calculating Effective Thermal Conductivity of the Fibrous Porous Materials
    Kan, An-Kang
    Cao, Dan
    Zhang, Xue-Lai
    [J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2015, 15 (04) : 3200 - 3205
  • [4] A novel method to determine effective thermal conductivity of porous materials
    Jiyu Qian
    Qiang Li
    Kai Yu
    Yimin Xuan
    [J]. Science in China Series E: Technological Sciences, 2004, 47 : 716 - 724
  • [5] A novel method to determine effective thermal conductivity of porous materials
    Qian, JY
    Li, Q
    Yu, K
    Xuan, YM
    [J]. SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2004, 47 (06): : 716 - 724
  • [6] Effective thermal conductivity for hydrate-bearing sediments under stress and local thermal stimulation conditions: A novel analytical model
    Lei, Gang
    Tang, Jiadi
    Zhang, Ling
    Wu, Qi
    Li, Jun
    [J]. ENERGY, 2024, 288
  • [7] A Model for Determining the Effective Thermal Conductivity of Porous Heterogeneous Materials
    Bicer, Ayse
    Kar, Filiz
    [J]. INTERNATIONAL JOURNAL OF THERMOPHYSICS, 2019, 40 (01)
  • [8] A Model for Determining the Effective Thermal Conductivity of Porous Heterogeneous Materials
    Ayse Bicer
    Filiz Kar
    [J]. International Journal of Thermophysics, 2019, 40
  • [9] A novel effective medium theory for modelling the thermal conductivity of porous materials
    Gong, Lunlun
    Wang, Yonghong
    Cheng, Xudong
    Zhang, Ruifang
    Zhang, Heping
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2014, 68 : 295 - 298
  • [10] A novel effective medium theory for modelling the thermal conductivity of porous materials
    Gong, Lunlun
    Wang, Yonghong
    Cheng, Xudong
    Zhang, Ruifang
    Zhang, Heping
    [J]. International Journal of Heat and Mass Transfer, 2014, 68 : 295 - 298