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Mechanistic insights into surface contribution towards heat transfer in a nanofluid

Nanofluids play a very important role in thermal management and heat exchange processes and for a stable nanofluid, a surfactant is a salient material. There are many contrasting reports on the thermal conductivity of nanofluids and the associated heat transport mechanism in nanofluids. In this arti...

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Autores principales: Singh, Ajit, Lenin, Ramanujam, Bari, Naimat Kalim, Bakli, Chirodeep, Bera, Chandan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419779/
https://www.ncbi.nlm.nih.gov/pubmed/36134284
http://dx.doi.org/10.1039/d0na00452a
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author Singh, Ajit
Lenin, Ramanujam
Bari, Naimat Kalim
Bakli, Chirodeep
Bera, Chandan
author_facet Singh, Ajit
Lenin, Ramanujam
Bari, Naimat Kalim
Bakli, Chirodeep
Bera, Chandan
author_sort Singh, Ajit
collection PubMed
description Nanofluids play a very important role in thermal management and heat exchange processes and for a stable nanofluid, a surfactant is a salient material. There are many contrasting reports on the thermal conductivity of nanofluids and the associated heat transport mechanism in nanofluids. In this article, four different types of nanoparticles are synthesized using citric acid and oleic acid as surfactants, followed by the assessment of their thermal conductivities. For a nanofluid of 3 wt% nanoparticles, coated with citric acid in water 67% reduction in thermal conductivity is observed, and on the other hand a 4% enhancement in thermal conductivity is observed for oleic acid-coated nanoparticles in toluene. This anomaly in the thermal transport behaviour of the nanofluid can be related to the surface properties of nanoparticles and the polarity of the base fluid. Theoretical calculation based on molecular dynamics simulations shows that the reduction in long-range interaction and fluid structuration reduce the thermal conductivity in a polar fluid with a polar surfactant coated nanoparticle.
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spelling pubmed-94197792022-09-20 Mechanistic insights into surface contribution towards heat transfer in a nanofluid Singh, Ajit Lenin, Ramanujam Bari, Naimat Kalim Bakli, Chirodeep Bera, Chandan Nanoscale Adv Chemistry Nanofluids play a very important role in thermal management and heat exchange processes and for a stable nanofluid, a surfactant is a salient material. There are many contrasting reports on the thermal conductivity of nanofluids and the associated heat transport mechanism in nanofluids. In this article, four different types of nanoparticles are synthesized using citric acid and oleic acid as surfactants, followed by the assessment of their thermal conductivities. For a nanofluid of 3 wt% nanoparticles, coated with citric acid in water 67% reduction in thermal conductivity is observed, and on the other hand a 4% enhancement in thermal conductivity is observed for oleic acid-coated nanoparticles in toluene. This anomaly in the thermal transport behaviour of the nanofluid can be related to the surface properties of nanoparticles and the polarity of the base fluid. Theoretical calculation based on molecular dynamics simulations shows that the reduction in long-range interaction and fluid structuration reduce the thermal conductivity in a polar fluid with a polar surfactant coated nanoparticle. RSC 2020-06-10 /pmc/articles/PMC9419779/ /pubmed/36134284 http://dx.doi.org/10.1039/d0na00452a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Singh, Ajit
Lenin, Ramanujam
Bari, Naimat Kalim
Bakli, Chirodeep
Bera, Chandan
Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title_full Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title_fullStr Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title_full_unstemmed Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title_short Mechanistic insights into surface contribution towards heat transfer in a nanofluid
title_sort mechanistic insights into surface contribution towards heat transfer in a nanofluid
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419779/
https://www.ncbi.nlm.nih.gov/pubmed/36134284
http://dx.doi.org/10.1039/d0na00452a
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