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<p>The present paper computationally investigates the influence of fins on phase change material (PCM) melting within a rectangular enclosure. ANSYS/FLUENT 16 was used with the enthalpy-porosity method to simulate the phase change in paraffin wax (RT42). Four cases were taken into account: a finless model and three fin models of varying lengths (5&#xa0;mm, 10&#xa0;mm, and 15&#xa0;mm). Results indicate that fins enhance heat transfer by enhanced conduction and thus accelerate the phase change in melting. In the absence of fins, melting occurs primarily through natural convection, leading to a delay in phase transition. The addition of 5&#xa0;mm fins reduces melting time by 25%, whereas 10&#xa0;mm and 15&#xa0;mm fins reduce it by 38% and 50%, respectively. The results highlight that a higher length of fins greatly increases the spreading of heat and the effectiveness of melting. This research points out the efficacy of fins in enhancing thermal energy storage systems and presents valuable lessons for the development of the efficiency of PCM-based heat storage systems. The results present valuable guidelines for developing efficient thermal management systems for renewable energy storage, electronics cooling, and industrial heat recovery systems.</p>

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Enhancing phase change material melting in rectangular enclosures: a numerical study on the impact of fin length on heat transfer efficiency

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Saif Ali Kadhim,
  • Walaa Nasser Abbas,
  • Karrar A. Hammoodi,
  • Ali M. Ashour,
  • Abdallah Bouabidi,
  • Mujtaba A. Flayyih,
  • Hasan Qahtan Hussein,
  • Farhan Lafta Rashid

摘要

The present paper computationally investigates the influence of fins on phase change material (PCM) melting within a rectangular enclosure. ANSYS/FLUENT 16 was used with the enthalpy-porosity method to simulate the phase change in paraffin wax (RT42). Four cases were taken into account: a finless model and three fin models of varying lengths (5 mm, 10 mm, and 15 mm). Results indicate that fins enhance heat transfer by enhanced conduction and thus accelerate the phase change in melting. In the absence of fins, melting occurs primarily through natural convection, leading to a delay in phase transition. The addition of 5 mm fins reduces melting time by 25%, whereas 10 mm and 15 mm fins reduce it by 38% and 50%, respectively. The results highlight that a higher length of fins greatly increases the spreading of heat and the effectiveness of melting. This research points out the efficacy of fins in enhancing thermal energy storage systems and presents valuable lessons for the development of the efficiency of PCM-based heat storage systems. The results present valuable guidelines for developing efficient thermal management systems for renewable energy storage, electronics cooling, and industrial heat recovery systems.