Numerical Simulation Study of Coagulation Characteristics of Paraffin Cavity with Gradient TPMS Framework

Ma Chaofu; Chen Baoming; Jian Yu; Zhong Chonglong; Li Hongchen

doi:10.12465/j.issn.0253-4339.2025.06.132

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Numerical Simulation Study of Coagulation Characteristics of Paraffin Cavity with Gradient TPMS Framework

更新时间：2025-12-03

- Numerical Simulation Study of Coagulation Characteristics of Paraffin Cavity with Gradient TPMS Framework
- Journal of Refrigeration Vol. 46, Issue 6, Pages: 132-140(2025)
- 作者机构：
  
  山东建筑大学热能工程学院　济南　 250101
- 作者简介：
  
  Chen Baoming, male, professor, School of Thermal Energy Engineering, Shandong Jianzhu University, 86-15954144580, E-mail: chenbm@sdjzu.edu.cn. Research fields: fluid flow and heat transfer and mass transfer in complex media and systems.
- 基金信息：
  
  National Natural Science Foundation of China(51976111)
- DOI：10.12465/j.issn.0253-4339.2025.06.132
  CLC： TB61⁺1;TP391.9
- Received：06 June 2024，
  
  Revised：2024-09-16，
  
  Accepted：26 September 2024，
  
  Published：16 December 2025
- 稿件说明：
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Ma Chaofu, Chen Baoming, Jian Yu, et al. Numerical Simulation Study of Coagulation Characteristics of Paraffin Cavity with Gradient TPMS Framework[J]. Journal of Refrigeration, 2025, 46(6): 132-140.
DOI：

Ma Chaofu, Chen Baoming, Jian Yu, et al. Numerical Simulation Study of Coagulation Characteristics of Paraffin Cavity with Gradient TPMS Framework[J]. Journal of Refrigeration, 2025, 46(6): 132-140. DOI： 10.12465/j.issn.0253-4339.2025.06.132.

摘要

通过三周期极小曲面法（TPMS）构建均匀金属骨架和梯度孔隙率骨架。基于孔隙尺度，采用有限元方法数值模拟含金属骨架的相变材料的凝固过程，并与纯石蜡腔体的凝固过程进行对比，考察复合相变材料凝固中骨架结构的影响规律。对凝固过程中固液相变界面、整体液相率、瞬时固化速率、冷源壁面

、储冷性能等方面进行综合分析。研究表明：在相变腔体中加入TPMS骨架，对固液形变过程影响显著，其中孔隙率为0.78的相变腔体相比纯石蜡相变腔体凝固时间缩短94.10%，储冷速率提升12.98倍。在平均孔隙率为0.84时，孔隙率沿

方向增大，可加快腔体凝固，提升腔体传热效率，相比纯石蜡相变腔体凝固时间缩短93.50%，储冷速率提升12.60倍；相比相同孔隙率均匀TPMS骨架相变腔体凝固时间缩短12.23%，储冷速率提升15.30%。

Abstract

In this study

homogeneous metal and gradient porosity skeletons were constructed using the three-periodic minimal surface method (TPMS). Based on the pore scale

the finite element method was used to simulate the solidification process for a pure paraffin cavity and investigate the influence of the skeleton structure in the solidification of a composite phase-change material. Comprehensive analyses of the solid-liquid phase change interface

overall liquid phase rate

number of the cold source wall

and cold-storage performance were conducted

and the following conclusion was obtained. When the TPMS skeleton was added to the phase change cavity

it affected the solid-liquid deformation process. The solidification time of the phase change chamber with a porosity of 0.78 is shortened by 94.1% and the cooling rate is increased by 12.98 times compared to the pure paraffin phase change chamber. When the average porosity is 0.84

the porosity gradient increases along the positive

-direction

accelerating the solidification of the cavity

improving the heat transfer efficiency of the chamber. Compared with the pure paraffin phase change chamber

the solidification ti

me is shortened by 93.5%

and the cold storage rate is increased by 12.6 times. Compared with the same porosity and uniform TPMS skeleton phase change cavity

the solidification time is shortened by 12.23% and the cooling rate is increased by 15.3%.

关键词

Keywords

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