NUMERICAL STUDY ON HEAT TRANSFER WITHIN A ROCK-AIR-WATER-ICE SYSTEM UNDER CRYOGENIC CONDITIONS

被引:0
作者
Huang, Chengyu [1 ,2 ]
Dong, Bo [1 ,2 ]
Li, Weizhong [1 ,2 ]
Wang, Wenhua [3 ]
机构
[1] Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Liaoning, Peoples R China
[2] Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Liaoning, Peoples R China
[3] Dalian Univ Technol, Sch Naval Architecture, Dalian 116024, Liaoning, Peoples R China
基金
中国国家自然科学基金;
关键词
numerical simulation; heat transfer; natural convection; water freezing; MECHANICAL-PROPERTIES; PHASE-CHANGE; NATURAL-GAS; SHALE GAS; LIQUID; FRACTURE; CONVECTION; GRANITE;
D O I
暂无
中图分类号
O414.1 [热力学];
学科分类号
摘要
A numerical heat transfer model which couples heat conduction, natural convection, and the freezing process is built with ANSYS FLUENT. Then, 2D simulations of heat transfer in a rock-air-water-ice system under cryogenic conditions are conducted by using the model for studying the heat transfer mechanism in the reservoir stratum during cryogenic fracturing. The effects of air and water on the local temperature evolution are analyzed from the aspect of thermophysical properties, natural convection, and the water freezing process. For thermophysical properties, it is found that the influence of volumetric heat capacity is significant in the early stage of heat transfer, while in a long-term heat transfer process the effect of thermal conductivity is dominant. Natural convection alters the cold energy distribution and exerts different influences on the local temperature variation, and these effects could be weakened due to the presence of water. The release of latent heat due to water freezing delays the decrease of local temperature, while the newly formed ice phase accelerates the decrease of local temperature due to its relatively high thermal conductivity compared with that of water. Besides, the effect of water distribution on heat transfer is analyzed. Variation in water distribution alters the range and intensity of the impact brought by natural convection and water freezing, affecting temperature evolution. The combined effect of natural convection and water freezing affects the local temperature variation differently, depending on the time and position concerned.
引用
收藏
页码:49 / 76
页数:28
相关论文
共 40 条
  • [1] Alqahtani Naif Bandar, 2015, Experimental study and finite element modeling of cryogenic fracturing in unconventional reservoirs
  • [2] NATURAL-CONVECTION FLOW IN A SQUARE CAVITY REVISITED - LAMINAR AND TURBULENT MODELS WITH WALL FUNCTIONS
    BARAKOS, G
    MITSOULIS, E
    ASSIMACOPOULOS, D
    [J]. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 1994, 18 (07) : 695 - 719
  • [3] "Fracking" controversy and communication: Using national survey data to understand public perceptions of hydraulic fracturing
    Boudet, Hilary
    Clarke, Christopher
    Bugden, Dylan
    Maibach, Edward
    Roser-Renouf, Connie
    Leiserowitz, Anthony
    [J]. ENERGY POLICY, 2014, 65 : 57 - 67
  • [4] Experiment of coal damage due to super-cooling with liquid nitrogen
    Cai, Chengzheng
    Li, Gensheng
    Huang, Zhongwei
    Tian, Shouceng
    Shen, Zhonghou
    Fu, Xuan
    [J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2015, 22 : 42 - 48
  • [5] Experimental study of the effect of liquid nitrogen cooling on rock pore structure
    Cai, Chengzheng
    Li, Gensheng
    Huang, Zhongwei
    Shen, Zhonghou
    Tian, Shouceng
    Wei, Jiangwei
    [J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2014, 21 : 507 - 517
  • [6] Cryogenic fracturing for reservoir stimulation - Laboratory studies
    Cha, Minsu
    Yin, Xiaolong
    Kneafsey, Timothy
    Johanson, Brent
    Alqahtani, Naif
    Miskimins, Jennifer
    Patterson, Taylor
    Wu, Yu-Shu
    [J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2014, 124 : 436 - 450
  • [7] DAVIS GD, 1983, INT J NUMER METH FL, V3, P249
  • [8] Study on the surface crack propagation mechanism of coal and sandstone subjected to cryogenic cooling with liquid nitrogen
    Du, Menglin
    Gao, Feng
    Cai, Chengzheng
    Su, Shanjie
    Wang, Zekai
    [J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2020, 81
  • [9] FRACTURE PROPAGATION IN ROCK BY TRANSIENT COOLING
    FINNIE, I
    COOPER, GA
    BERLIE, J
    [J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 1979, 16 (01) : 11 - 21
  • [10] Experimental research on rock fracture failure characteristics under liquid nitrogen cooling conditions
    Gao, Feng
    Cai, Chengzheng
    Yang, Yugui
    [J]. RESULTS IN PHYSICS, 2018, 9 : 252 - 262