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A modified dynamic Lee model for two-phase closed thermosyphon (TPCT) simulation

Ding, Liang ; Wang, Wei ; Peng, Bingbing ; Li, Bingrui ; Li, Bingxi and Sunden, Bengt LU (2023) In Numerical Heat Transfer, Part B: Fundamentals
Abstract

A modified model consisting of a dynamic Lee model, volume of fluid model, and continuum surface force model is developed. The modified model investigates heat transfer characteristics of the vapor–liquid phase change process and details of the two-phase flow during operation of a two-phase closed thermosyphon. The mass transfer time relaxation parameters for the Lee phase change model are the most critical coefficients which determine the rate of the vapor–liquid phase change. A dynamic adjustment of the mass transfer time relaxation parameters for the Lee phase change model is realized based on the amount of mass transfer between the vapor and liquid phases and the values of the mass transfer time relaxation parameters become... (More)

A modified model consisting of a dynamic Lee model, volume of fluid model, and continuum surface force model is developed. The modified model investigates heat transfer characteristics of the vapor–liquid phase change process and details of the two-phase flow during operation of a two-phase closed thermosyphon. The mass transfer time relaxation parameters for the Lee phase change model are the most critical coefficients which determine the rate of the vapor–liquid phase change. A dynamic adjustment of the mass transfer time relaxation parameters for the Lee phase change model is realized based on the amount of mass transfer between the vapor and liquid phases and the values of the mass transfer time relaxation parameters become stabilized. The relative error between the modified model and experimental data for the temperature distribution is 5%, representing an acceptable agreement. Compared with the original model, the maximum thermal resistance errors in evaporation section and condensation section are reduced by 19.3% and 107.1%, respectively. These results indicate that the modified model can provide good corrections with high accuracy.

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organization
publishing date
type
Contribution to journal
publication status
in press
subject
keywords
Dynamic Lee model, phase change heat transfer, transient mass transfer time relaxation parameters, two-phase closed thermosyphon
in
Numerical Heat Transfer, Part B: Fundamentals
publisher
Taylor & Francis
external identifiers
  • scopus:85173522860
ISSN
1040-7790
DOI
10.1080/10407790.2023.2262114
language
English
LU publication?
yes
id
e8360bcf-44ce-4301-88d8-0b97bded0259
date added to LUP
2024-01-12 11:15:23
date last changed
2024-01-12 11:17:25
@article{e8360bcf-44ce-4301-88d8-0b97bded0259,
  abstract     = {{<p>A modified model consisting of a dynamic Lee model, volume of fluid model, and continuum surface force model is developed. The modified model investigates heat transfer characteristics of the vapor–liquid phase change process and details of the two-phase flow during operation of a two-phase closed thermosyphon. The mass transfer time relaxation parameters for the Lee phase change model are the most critical coefficients which determine the rate of the vapor–liquid phase change. A dynamic adjustment of the mass transfer time relaxation parameters for the Lee phase change model is realized based on the amount of mass transfer between the vapor and liquid phases and the values of the mass transfer time relaxation parameters become stabilized. The relative error between the modified model and experimental data for the temperature distribution is 5%, representing an acceptable agreement. Compared with the original model, the maximum thermal resistance errors in evaporation section and condensation section are reduced by 19.3% and 107.1%, respectively. These results indicate that the modified model can provide good corrections with high accuracy.</p>}},
  author       = {{Ding, Liang and Wang, Wei and Peng, Bingbing and Li, Bingrui and Li, Bingxi and Sunden, Bengt}},
  issn         = {{1040-7790}},
  keywords     = {{Dynamic Lee model; phase change heat transfer; transient mass transfer time relaxation parameters; two-phase closed thermosyphon}},
  language     = {{eng}},
  publisher    = {{Taylor & Francis}},
  series       = {{Numerical Heat Transfer, Part B: Fundamentals}},
  title        = {{A modified dynamic Lee model for two-phase closed thermosyphon (TPCT) simulation}},
  url          = {{http://dx.doi.org/10.1080/10407790.2023.2262114}},
  doi          = {{10.1080/10407790.2023.2262114}},
  year         = {{2023}},
}