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<p>This study examines the impact of alumina oxide nanofluid on pressure drop and heat transfer in a compact pipe, commonly used in automotive cooling systems. Both numerical (ANSYS) and experimental approaches were employed, with Reynolds numbers ranging from 3500 to 7500 with nanofluid concentrations of 0.0%, 0.40%, 0.60%, and 0.80%. Experimental results validated the numerical findings within an acceptable margin of error. The study highlights that nanoparticle concentration and fluid temperature significantly affect thermophysical properties such as specific heat, density, thermal conductivity, and viscosity. Heat transfer performance improved with higher Reynolds numbers at temperatures between 40 and 70&#xa0;°C. The highest heat transfer enhancement (49%) was observed at 0.6% nanoparticle concentration, while a 0.8% concentration reduced heat transfer efficiency. The use of nanofluids also increased pressure drop, which rose by approximately 7%. Additionally, a higher Reynolds number correlated with greater pressure drop. The findings indicate that nanofluids enhanced the thermal performance and enable size reduction in compact heat exchangers, making them more efficient for automotive applications.</p>

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Thermal and flow performance of alumina nanofluids in compact tube

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Gurpreet Singh Sokhal,
  • Gurprinder Singh Dhindsa,
  • Rupinder Singh,
  • Narinder Singh,
  • Jasgurpreet Singh Chohan,
  • Nagaraj Patil,
  • Rahul Singh,
  • Abhijit Bhowmik

摘要

This study examines the impact of alumina oxide nanofluid on pressure drop and heat transfer in a compact pipe, commonly used in automotive cooling systems. Both numerical (ANSYS) and experimental approaches were employed, with Reynolds numbers ranging from 3500 to 7500 with nanofluid concentrations of 0.0%, 0.40%, 0.60%, and 0.80%. Experimental results validated the numerical findings within an acceptable margin of error. The study highlights that nanoparticle concentration and fluid temperature significantly affect thermophysical properties such as specific heat, density, thermal conductivity, and viscosity. Heat transfer performance improved with higher Reynolds numbers at temperatures between 40 and 70 °C. The highest heat transfer enhancement (49%) was observed at 0.6% nanoparticle concentration, while a 0.8% concentration reduced heat transfer efficiency. The use of nanofluids also increased pressure drop, which rose by approximately 7%. Additionally, a higher Reynolds number correlated with greater pressure drop. The findings indicate that nanofluids enhanced the thermal performance and enable size reduction in compact heat exchangers, making them more efficient for automotive applications.