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Numerical Study on Flow-Melt Characteristics of Ice Slurry in Horizontal Straight Pipe with a Local Large Heat Flux Segment

Author

Listed:
  • Fushou Xie

    (Institute of Refrigeration and Cryogenic Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, China)

  • Wan Guo

    (Institute of Refrigeration and Cryogenic Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Yuhao Zhu

    (Institute of Refrigeration and Cryogenic Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Ice slurry is a high energy density coolant with excellent flow, phase change, and thermophysical properties. In order to investigate the recovery of ice slurry flowing through a local large heat flux segment, a 3D Eulerian-Eulerian model based on the granular kinetic theory considering the flow and melting phase change of ice slurry is developed. Sensitivity analysis of interphase forces is carried out. A comparison of the pressure drop, solid phase velocity, and heat transfer coefficient with empirical data is carried out, respectively. The calculated results are in good agreement with the experimental results, indicating that the numerical model could accurately describe the flow and melting characteristics. Thermophysical field distributions, the axial variation of ice volume fraction (IVF), recovery curve, the average heat transfer coefficient, as well as the re-uniformization length are obtained. After passing through local large heat flux segment, due to shear stress action, the IVF and the particle uniformity of the cross section have recovery characteristics. The gradient of the recovery curve decreases with increasing inlet IVF as well as with increasing Reynolds number. After the local large heat flux increases to a certain value, its effect on the recovery curve of the ice slurry is small. The re-uniformization length increases as the local large heat flux increases. The average heat transfer coefficient of local large heat flux segment increases due to damage of the boundary layer. These results can provide a theoretical basis for the design of ice slurry systems in practical application.

Suggested Citation

  • Fushou Xie & Wan Guo & Yuhao Zhu, 2023. "Numerical Study on Flow-Melt Characteristics of Ice Slurry in Horizontal Straight Pipe with a Local Large Heat Flux Segment," Energies, MDPI, vol. 16(1), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:1:p:476-:d:1022321
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    References listed on IDEAS

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    1. Ma, Fei & Zhang, Peng, 2020. "A review of thermo-fluidic performance and application of shellless phase change slurry: Part 2 – Flow and heat transfer characteristics," Energy, Elsevier, vol. 192(C).
    2. Ma, Fei & Zhang, Peng, 2019. "A review of thermo-fluidic performance and application of shellless phase change slurry: Part 1 – Preparations, properties and applications," Energy, Elsevier, vol. 189(C).
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