Eur. Phys. J. Plus (2021) 136: 469
https://doi.org/10.1140/epjp/s13360-021-01412-0

Regular Article

Comparative thermal analysis of an EG-based nanofluid containing DWCNTs

Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran

^b saeedesfandeh.uk@gmail.com

Received: 15 July 2020
Accepted: 9 April 2021
Published online: 29 April 2021

Abstract

The thermal conductivity (TC) of DWCNT/EG nanofluid at the temperature range of 30–50 °C and solid volume fraction (SVF) range of 0.055–0.92% was investigated. The results showed that the enhancement of SVF at 50 °C increases TC up to 35.37%. Experimental data obtained for this nanofluid were compared with experimental results of SWCNT/EG, DWCNT–ZnO/EG–water (40:60), MWCNT–ZnO (50:50)/EG–water (50:50) and SWCNT–ZnO (30:70)/EG–water (60:40). Using experimental data, a correlation was proposed for the prediction of TC with R² (regression coefficient) and maximum correlation error of 0.993687% and 2%, respectively. Nanofluid sensitivity analysis showed that in higher SVFs, the increment of sensitivity relative to temperature is higher than in lower SVFs.