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Study of the heat transfer performance of gravity heat pipes based on lattice Boltzmann surface modification.

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Title: Study of the heat transfer performance of gravity heat pipes based on lattice Boltzmann surface modification.
Authors: Zhan, Hongren1 (AUTHOR), Li, Shuai1 (AUTHOR), Li, Quan1 (AUTHOR), Lin, Ruting1 (AUTHOR), Jin, Zhihao1 (AUTHOR) jzh_sict_In@sina.com, Ji, Baichen1 (AUTHOR), Zhang, Gang1 (AUTHOR), Zhang, Zhigang1 (AUTHOR)
Source: Journal of Mechanical Science & Technology. Oct2022, Vol. 36 Issue 10, p5253-5266. 14p.
Subjects: Heat transfer, Heat transfer coefficient, Heat pipes, Lattice Boltzmann methods, Phase transitions, Heat convection, Thermal resistance
Abstract: Surface modification is an important means to improve boiling heat transfer. Based on the research of surface wettability, this paper briefly describes the experimental and numerical simulation research on enhancing heat transfer of gravity heat pipe by changing surface wettability. According to the microscopic nature and mesoscopic characteristics of lattice Boltzmann method, the gas-liquid model of pseudo-potential lattice Boltzmann method was used to simulate the heat transfer process of gravity heat pipe with different wettability, and the corresponding morphology diagrams of boiling and condensation phenomena were obtained. It not only overcomes the disadvantage that it is difficult to study the bubble nucleation mechanism by arranging seed bubbles or seed droplets in advance when simulating phase transition in the macro flow model, but also overcomes the defect that Lennard-Jones potential in molecular dynamics cannot accurately describe the force between fluid molecules and wall solid molecules. Then, combining the simulated visual images and experimental results, the heat transfer mechanism of gravity heat pipes with different wetting properties is analyzed in detail. The results show that compared with ordinary heat pipes, the equivalent convection heat transfer coefficient of fully mixed wettability gravity heat pipe is increased by about 45.6 % and the total thermal resistance is reduced by about 40.2 %, which provides a theoretical basis for practical application. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Mechanical Science & Technology 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.)
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DbLabel: Engineering Source
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  Data: Study of the heat transfer performance of gravity heat pipes based on lattice Boltzmann surface modification.
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  Data: <searchLink fieldCode="AR" term="%22Zhan%2C+Hongren%22">Zhan, Hongren</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shuai%22">Li, Shuai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Quan%22">Li, Quan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Ruting%22">Lin, Ruting</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+Zhihao%22">Jin, Zhihao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jzh_sict_In@sina.com</i><br /><searchLink fieldCode="AR" term="%22Ji%2C+Baichen%22">Ji, Baichen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Gang%22">Zhang, Gang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhigang%22">Zhang, Zhigang</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Mechanical+Science+%26+Technology%22">Journal of Mechanical Science & Technology</searchLink>. Oct2022, Vol. 36 Issue 10, p5253-5266. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer+coefficient%22">Heat transfer coefficient</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+pipes%22">Heat pipes</searchLink><br /><searchLink fieldCode="DE" term="%22Lattice+Boltzmann+methods%22">Lattice Boltzmann methods</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+convection%22">Heat convection</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+resistance%22">Thermal resistance</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Surface modification is an important means to improve boiling heat transfer. Based on the research of surface wettability, this paper briefly describes the experimental and numerical simulation research on enhancing heat transfer of gravity heat pipe by changing surface wettability. According to the microscopic nature and mesoscopic characteristics of lattice Boltzmann method, the gas-liquid model of pseudo-potential lattice Boltzmann method was used to simulate the heat transfer process of gravity heat pipe with different wettability, and the corresponding morphology diagrams of boiling and condensation phenomena were obtained. It not only overcomes the disadvantage that it is difficult to study the bubble nucleation mechanism by arranging seed bubbles or seed droplets in advance when simulating phase transition in the macro flow model, but also overcomes the defect that Lennard-Jones potential in molecular dynamics cannot accurately describe the force between fluid molecules and wall solid molecules. Then, combining the simulated visual images and experimental results, the heat transfer mechanism of gravity heat pipes with different wetting properties is analyzed in detail. The results show that compared with ordinary heat pipes, the equivalent convection heat transfer coefficient of fully mixed wettability gravity heat pipe is increased by about 45.6 % and the total thermal resistance is reduced by about 40.2 %, which provides a theoretical basis for practical application. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Mechanical Science & Technology 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/s12206-022-0938-4
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        Text: English
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        StartPage: 5253
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        Type: general
      – SubjectFull: Heat transfer coefficient
        Type: general
      – SubjectFull: Heat pipes
        Type: general
      – SubjectFull: Lattice Boltzmann methods
        Type: general
      – SubjectFull: Phase transitions
        Type: general
      – SubjectFull: Heat convection
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      – SubjectFull: Thermal resistance
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      – TitleFull: Study of the heat transfer performance of gravity heat pipes based on lattice Boltzmann surface modification.
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            NameFull: Zhan, Hongren
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            NameFull: Lin, Ruting
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            – D: 01
              M: 10
              Text: Oct2022
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