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Experimental study of air natural convection on metallic foam-sintered plate

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Title: Experimental study of air natural convection on metallic foam-sintered plate
Authors: Qu, Zhiguo1 zgqu@mail.xjtu.edu.cn, Wang, Tiansong1, Tao, Wenquan1, Lu, Tianjian2
Source: International Journal of Heat & Fluid Flow. Dec2012, Vol. 38, p126-132. 7p.
Subjects: Natural heat convection, Metal foams, Sintering, Structural plates, Copper
Abstract: Abstract: The natural convection on metallic foam-sintered plate at different inclination angles was experimentally studied. Seven copper foam samples with different pore densities (10–40 pore per inch), porosities (0.90–0.95), and aspect ratios (the ratio of foam thickness to sample length, 0.1–0.5) were measured at inclination angles of 0° (vertical orientation), 15°, 30°, 45°, 60°, 75°, 90° (horizontal orientation). The heat conduction and natural convection inside the foam both contributed to the total heat transfer. Although, the form and viscous drag, which are influenced by permeability and viscous friction in the thermal boundary layer respectively, tend to suppress the natural convection, the heat transfer was finally enhanced by the foam sintered surface due to large surface area extension. Optimum inclination range 60–75° corresponding to maximum average Nu number was found in the heat flux range of 600–1800W/m2. The sintered foam surface with lower porosity and pore density was recommended for heat transfer enhancement. Particularly, the sample with porosity 0.9, pore density of 10PPI, aspect ratio of 0.5 offered the highest average Nu number among the studied samples. An empirical correlation for modified Nusselt number at isoflux boundary condition considering the foam morphology parameter and inclination angle was proposed within deviation ±15% between the correlation and the experimental data. [Copyright &y& Elsevier]
Copyright of International Journal of Heat & Fluid Flow is the property of Elsevier B.V. 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: Engineering Source
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DbLabel: Engineering Source
An: 83931123
AccessLevel: 6
PubType: Academic Journal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Experimental study of air natural convection on metallic foam-sintered plate
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Qu%2C+Zhiguo%22">Qu, Zhiguo</searchLink><relatesTo>1</relatesTo><i> zgqu@mail.xjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Tiansong%22">Wang, Tiansong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tao%2C+Wenquan%22">Tao, Wenquan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lu%2C+Tianjian%22">Lu, Tianjian</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Heat+%26+Fluid+Flow%22">International Journal of Heat & Fluid Flow</searchLink>. Dec2012, Vol. 38, p126-132. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Natural+heat+convection%22">Natural heat convection</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+foams%22">Metal foams</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+plates%22">Structural plates</searchLink><br /><searchLink fieldCode="DE" term="%22Copper%22">Copper</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The natural convection on metallic foam-sintered plate at different inclination angles was experimentally studied. Seven copper foam samples with different pore densities (10–40 pore per inch), porosities (0.90–0.95), and aspect ratios (the ratio of foam thickness to sample length, 0.1–0.5) were measured at inclination angles of 0° (vertical orientation), 15°, 30°, 45°, 60°, 75°, 90° (horizontal orientation). The heat conduction and natural convection inside the foam both contributed to the total heat transfer. Although, the form and viscous drag, which are influenced by permeability and viscous friction in the thermal boundary layer respectively, tend to suppress the natural convection, the heat transfer was finally enhanced by the foam sintered surface due to large surface area extension. Optimum inclination range 60–75° corresponding to maximum average Nu number was found in the heat flux range of 600–1800W/m2. The sintered foam surface with lower porosity and pore density was recommended for heat transfer enhancement. Particularly, the sample with porosity 0.9, pore density of 10PPI, aspect ratio of 0.5 offered the highest average Nu number among the studied samples. An empirical correlation for modified Nusselt number at isoflux boundary condition considering the foam morphology parameter and inclination angle was proposed within deviation ±15% between the correlation and the experimental data. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Heat & Fluid Flow is the property of Elsevier B.V. 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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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijheatfluidflow.2012.08.005
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 126
    Subjects:
      – SubjectFull: Natural heat convection
        Type: general
      – SubjectFull: Metal foams
        Type: general
      – SubjectFull: Sintering
        Type: general
      – SubjectFull: Structural plates
        Type: general
      – SubjectFull: Copper
        Type: general
    Titles:
      – TitleFull: Experimental study of air natural convection on metallic foam-sintered plate
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Qu, Zhiguo
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          Name:
            NameFull: Wang, Tiansong
      – PersonEntity:
          Name:
            NameFull: Tao, Wenquan
      – PersonEntity:
          Name:
            NameFull: Lu, Tianjian
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          Dates:
            – D: 01
              M: 12
              Text: Dec2012
              Type: published
              Y: 2012
          Identifiers:
            – Type: issn-print
              Value: 0142727X
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            – Type: volume
              Value: 38
          Titles:
            – TitleFull: International Journal of Heat & Fluid Flow
              Type: main
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