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Numerical modeling on the sensitivity of directional dependent interface heat transfer on thermal transport in a coupled fracture-matrix system.

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Title: Numerical modeling on the sensitivity of directional dependent interface heat transfer on thermal transport in a coupled fracture-matrix system.
Authors: Veettil, Rakesh, Kumar, Govindarajan
Source: Geosciences Journal; Oct2016, Vol. 20 Issue 5, p639-647, 9p
Subject Terms: HEAT transfer, FRACTURE mechanics, NUMERICAL analysis, POROSITY, HEAT exchangers
Abstract: The conventional dual-porosity model has been modified by considering the heat exchange term at the fracture-matrix interface in the governing equation for thermal transport within the low permeable rock-matrix as against its conventional consideration within the high permeable fracture. A finite volume numerical model has been developed in order to analyze the influence of the source/sink term which defines the heat transfer at the fracturematrix interface. The comparison of the spatial distribution for temperature within the fracture and within the reservoir matrix for two different models, (1) conventional model in which the source/sink heat transfer term included in the equation for thermal transport within the fracture; (2) proposed model in which the source/sink heat transfer term included in the equation for thermal transport within the rock-matrix, have been performed. In addition, the sensitivity of the reservoir matrix thermal conductivities, both horizontal and vertical, on thermal energy extraction from the reservoir matrix has also been analyzed using the proposed model. Numerical results suggest that the estimation of temperature distribution in the fracture and rock-matrix and thus quantifying the heat extraction from the reservoir matrix is underestimated in a fracture-matrix system by using the conventional thermal transport model. It has been also observed that the temperature distribution obtained in the fracture and the rock-matrix by considering the heat transfer term in the thermal transport equation within the fracture shows significant variation from the temperature distribution obtained by considering the heat transfer term in the equation for thermal transport within the rock-matrix. [ABSTRACT FROM AUTHOR]
Copyright of Geosciences Journal is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Complementary Index
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  Data: Numerical modeling on the sensitivity of directional dependent interface heat transfer on thermal transport in a coupled fracture-matrix system.
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  Data: <searchLink fieldCode="AR" term="%22Veettil%2C+Rakesh%22">Veettil, Rakesh</searchLink><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Govindarajan%22">Kumar, Govindarajan</searchLink>
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  Data: Geosciences Journal; Oct2016, Vol. 20 Issue 5, p639-647, 9p
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  Data: <searchLink fieldCode="DE" term="%22HEAT+transfer%22">HEAT transfer</searchLink><br /><searchLink fieldCode="DE" term="%22FRACTURE+mechanics%22">FRACTURE mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22NUMERICAL+analysis%22">NUMERICAL analysis</searchLink><br /><searchLink fieldCode="DE" term="%22POROSITY%22">POROSITY</searchLink><br /><searchLink fieldCode="DE" term="%22HEAT+exchangers%22">HEAT exchangers</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The conventional dual-porosity model has been modified by considering the heat exchange term at the fracture-matrix interface in the governing equation for thermal transport within the low permeable rock-matrix as against its conventional consideration within the high permeable fracture. A finite volume numerical model has been developed in order to analyze the influence of the source/sink term which defines the heat transfer at the fracturematrix interface. The comparison of the spatial distribution for temperature within the fracture and within the reservoir matrix for two different models, (1) conventional model in which the source/sink heat transfer term included in the equation for thermal transport within the fracture; (2) proposed model in which the source/sink heat transfer term included in the equation for thermal transport within the rock-matrix, have been performed. In addition, the sensitivity of the reservoir matrix thermal conductivities, both horizontal and vertical, on thermal energy extraction from the reservoir matrix has also been analyzed using the proposed model. Numerical results suggest that the estimation of temperature distribution in the fracture and rock-matrix and thus quantifying the heat extraction from the reservoir matrix is underestimated in a fracture-matrix system by using the conventional thermal transport model. It has been also observed that the temperature distribution obtained in the fracture and the rock-matrix by considering the heat transfer term in the thermal transport equation within the fracture shows significant variation from the temperature distribution obtained by considering the heat transfer term in the equation for thermal transport within the rock-matrix. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Geosciences Journal is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s12303-015-0054-x
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 639
    Subjects:
      – SubjectFull: HEAT transfer
        Type: general
      – SubjectFull: FRACTURE mechanics
        Type: general
      – SubjectFull: NUMERICAL analysis
        Type: general
      – SubjectFull: POROSITY
        Type: general
      – SubjectFull: HEAT exchangers
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      – TitleFull: Numerical modeling on the sensitivity of directional dependent interface heat transfer on thermal transport in a coupled fracture-matrix system.
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            NameFull: Kumar, Govindarajan
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            – D: 01
              M: 10
              Text: Oct2016
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              Y: 2016
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