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<p>This study aims to investigate the influence of both nanoparticle volume fractions and temperature on the thermo-physical properties and rheological behavior of a CuO/crude oil-based nanofluid. The experimental conditions involved the use of a temperature range of 25–55&#xa0;°C and nanoparticle concentrations ranging from 0.05 to 0.75&#xa0;vol%. The highest increase in thermal conductivity was observed at a nanoparticle volume fraction of 0.75%, with a maximum improvement of 17.26% achieved using CuO nanoparticles. The specific heat capacity of the nanofluids decreased with enhancing temperature and indicated a downtrend with nanoparticles concentration. The largest decrease in specific heat capacity was observed at a nanoparticle volume fraction of 0.75%, indicating a maximum reduction in heat capacity. The density of crude oil was lower than the nanofluids and decreased with increasing temperature. The developed correlations showed excellent agreement with the experimental data, indicating a good accuracy and reliability in the analysis.</p>

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Preparation and characterization of thermo-physical and rheological properties of CuO/Crude oil nanofluids

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Marzieh Khastekhoda,
  • Abdolrasoul Pouranfard,
  • Parviz Darvishi

摘要

This study aims to investigate the influence of both nanoparticle volume fractions and temperature on the thermo-physical properties and rheological behavior of a CuO/crude oil-based nanofluid. The experimental conditions involved the use of a temperature range of 25–55 °C and nanoparticle concentrations ranging from 0.05 to 0.75 vol%. The highest increase in thermal conductivity was observed at a nanoparticle volume fraction of 0.75%, with a maximum improvement of 17.26% achieved using CuO nanoparticles. The specific heat capacity of the nanofluids decreased with enhancing temperature and indicated a downtrend with nanoparticles concentration. The largest decrease in specific heat capacity was observed at a nanoparticle volume fraction of 0.75%, indicating a maximum reduction in heat capacity. The density of crude oil was lower than the nanofluids and decreased with increasing temperature. The developed correlations showed excellent agreement with the experimental data, indicating a good accuracy and reliability in the analysis.