Why Carbon Nanotubes Improve Aqueous Nanofluid Thermal Conductivity: A Qualitative Model

Ibrahim Khoswan; Heba Nassar; Mohyeddin Assali; Abdelrahim AbuSafa; Shadi Sawalha; Hikmat Said Hilal

doi:10.20944/preprints202403.1841.v1

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preprints.org > chemistry and materials science > nanotechnology > doi: 10.20944/preprints202403.1841.v1

Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Why Carbon Nanotubes Improve Aqueous Nanofluid Thermal Conductivity: A Qualitative Model

Version 1 : Received: 28 March 2024 / Approved: 29 March 2024 / Online: 29 March 2024 (10:43:37 CET)

A peer-reviewed article of this Preprint also exists.

Khoswan, I.; Nassar, H.; Assali, M.; AbuSafa, A.; Sawalha, S.; Hilal, H.S. Why Carbon Nanotubes Improve Aqueous Nanofluid Thermal Conductivity: A Qualitative Model Critical Review. Processes 2024, 12, 834. Khoswan, I.; Nassar, H.; Assali, M.; AbuSafa, A.; Sawalha, S.; Hilal, H.S. Why Carbon Nanotubes Improve Aqueous Nanofluid Thermal Conductivity: A Qualitative Model Critical Review. Processes 2024, 12, 834.

Abstract

Media thermal conductivity is important in various heat-transfer processes. Many conventional fluid conductors suffered low conductivity and environmental issues. Therefore, researchers developed efficient aqueous nanofluid conductors. Carbon nanotubes (CNTs) are widely studied to reach efficient, stable, low-cost and environmentally-friendly aqueous-nanofluids. This review provides a clear understanding of how CNTs improve thermal conductivity of aqueous nanofluids. A qualitative model is presented to explain literature mechanisms behind improvement. CNT type effects are discussed with other factors such as aspect ratio, Reynold number, dispersion quality, composition, temperature and additives. CNT functionalization is described. Relations to estimate nanofluid thermal conductivity are discussed. The model will help specialists to tailor CNT aqueous nanofluids as desired.

Keywords

Carbon nanotubes (CNTs); Thermal conductivity enhancement of water; Heat transfer fluids; CNT aqueous nanofluids

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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