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<p>This study aimed to present a new accurate correlation for estimating the thermal conductivity of hybrid nanofluids (HNFs) based on experimental tests. After the preparation of MWCNT-MgO (15:85)/water-EG (70:30) HNFs, relative thermal conductivity (RTC) or Thermal Conductivity Enhancement (TCE) of the HNFs and the factors affecting it are measured experimentally. In this study, the phenomenon of increasing TCE during the change of independent variables such as temperature (T) and solid volume fraction (SVF) is considered. Phenomena such as Brownian motion in increasing T and SVF are discussed. The NF had a TCE value of 38% at T = 50&#xa0;°C and SVF = 1.1%. Also, in the theoretical part of this research, an attempt is made to present a new correlation with the optimization of the dependent variable (RTC) using the response surface methodology (RSM). The presented correlation was ordered 4 and had high accuracy (R<sup>2</sup> = 0.9951).</p>

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Novel accurate correlation for thermal conductivity of hybrid nanofluid containing MgO and MWCNT: experimental investigation

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Mohammad Hemmat Esfe,
  • Davood Toghraie,
  • Morteza Sarbaz Karajabad

摘要

This study aimed to present a new accurate correlation for estimating the thermal conductivity of hybrid nanofluids (HNFs) based on experimental tests. After the preparation of MWCNT-MgO (15:85)/water-EG (70:30) HNFs, relative thermal conductivity (RTC) or Thermal Conductivity Enhancement (TCE) of the HNFs and the factors affecting it are measured experimentally. In this study, the phenomenon of increasing TCE during the change of independent variables such as temperature (T) and solid volume fraction (SVF) is considered. Phenomena such as Brownian motion in increasing T and SVF are discussed. The NF had a TCE value of 38% at T = 50 °C and SVF = 1.1%. Also, in the theoretical part of this research, an attempt is made to present a new correlation with the optimization of the dependent variable (RTC) using the response surface methodology (RSM). The presented correlation was ordered 4 and had high accuracy (R2 = 0.9951).