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A new CFD-DEM model integrating particle-liquid and particle-wall heat transfer for ice slurry melting in heat exchange tube.

Author(s) : ZHOU Z., ZHANG G., LU W., WU Z., CUI D., DOU B., GONG Y., HAN H.

Type of article: IJR article

Summary

Ice slurry, a promising phase-change fluid for thermal energy storage and transport, exhibits complex flow and melting behaviors that are not fully captured by existing numerical models. A coupled Eulerian-Lagrangian framework is presented to calculate ice slurry phase change in a heat exchanger. This modelling framework comprehensively integrates three heat transfer mechanisms: (i) particle-fluid convective heat transfer, (ii) direct conductive particle-wall contact heat transfer, and (iii) liquid film conduction for particle-fluid-wall thermal exchange. Results show that liquid film conduction contributes 60 ~ 82% of the total heat transfer rate, while particle-fluid convection accounts for 18 ~ 40%, and direct particle-wall contact heat transfer is negligible (<1%). The minimum conduction distance significantly influences melting efficiency, with a reduction from 10-6 m to 10-12 m increasing total heat transfer by up to 338 W at a wall temperature of 303.15 K. Axial analysis reveals three distinct melting regimes: uniform, stratified development, and stable melting. This work provides a comprehensive and particle-resolved framework for optimizing ice slurry-based heat exchangers.

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Pages: 17 p.

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Details

  • Original title: A new CFD-DEM model integrating particle-liquid and particle-wall heat transfer for ice slurry melting in heat exchange tube.
  • Record ID : 30034762
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 185
  • Publication date: 2026/05
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2026.02.023

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