Cargando…
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...
Autores principales: | , , , , |
---|---|
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 |
_version_ | 1784777255884423168 |
---|---|
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. |
format | Online Article Text |
id | pubmed-9419779 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | RSC |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT singhajit mechanisticinsightsintosurfacecontributiontowardsheattransferinananofluid AT leninramanujam mechanisticinsightsintosurfacecontributiontowardsheattransferinananofluid AT barinaimatkalim mechanisticinsightsintosurfacecontributiontowardsheattransferinananofluid AT baklichirodeep mechanisticinsightsintosurfacecontributiontowardsheattransferinananofluid AT berachandan mechanisticinsightsintosurfacecontributiontowardsheattransferinananofluid |