Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering
The practical implication of nanofluids is essentially dependent on their accurate modelling, particularly in comparison with the high cost of experimental investigations, yet the accuracy of different computational approaches to simulate nanofluids remains controversial to this day. Therefore, the...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/2/277 |
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| author | Tehmina Ambreen Arslan Saleem Cheol Woo Park |
| author_facet | Tehmina Ambreen Arslan Saleem Cheol Woo Park |
| author_sort | Tehmina Ambreen |
| collection | DOAJ |
| description | The practical implication of nanofluids is essentially dependent on their accurate modelling, particularly in comparison with the high cost of experimental investigations, yet the accuracy of different computational approaches to simulate nanofluids remains controversial to this day. Therefore, the present study is aimed at analysing the homogenous, multiphase Eulerian–Eulerian (volume of fluid, mixture, Eulerian) and Lagrangian–Eulerian approximation of nanofluids containing nonspherical nanoparticles. The heat transfer and pressure drop characteristics of the multiwalled carbon nanotubes (MWCNT)-based and multiwalled carbon nanotubes/graphene nanoplatelets (MWCNT/GNP)-based nanofluids are computed by incorporating the influence of several physical mechanisms, including interfacial nanolayering. The accuracy of tested computational approaches is evaluated by considering particle concentration and Reynolds number ranges of 0.075–0.25 wt% and 200–470, respectively. The results demonstrate that for all nanofluid combinations and operational conditions, the Lagrangian–Eulerian approximation provides the most accurate convective heat transfer coefficient values with a maximum deviation of 5.34% for 0.25 wt% of MWCNT–water nanofluid at the largest Reynolds number, while single-phase and Eulerian–Eulerian multiphase models accurately estimate the thermal fields of the diluted nanofluids at low Reynolds numbers, but overestimate the results for denser nanofluids at high Reynolds numbers. |
| first_indexed | 2024-03-09T04:05:00Z |
| format | Article |
| id | doaj.art-d5f9cf5a193946889d052f8b242bfa9c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T04:05:00Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-d5f9cf5a193946889d052f8b242bfa9c2023-12-03T14:08:04ZengMDPI AGNanomaterials2079-49912021-01-0111227710.3390/nano11020277Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial LayeringTehmina Ambreen0Arslan Saleem1Cheol Woo Park2School of Mechanical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, KoreaSchool of Mechanical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, KoreaSchool of Mechanical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, KoreaThe practical implication of nanofluids is essentially dependent on their accurate modelling, particularly in comparison with the high cost of experimental investigations, yet the accuracy of different computational approaches to simulate nanofluids remains controversial to this day. Therefore, the present study is aimed at analysing the homogenous, multiphase Eulerian–Eulerian (volume of fluid, mixture, Eulerian) and Lagrangian–Eulerian approximation of nanofluids containing nonspherical nanoparticles. The heat transfer and pressure drop characteristics of the multiwalled carbon nanotubes (MWCNT)-based and multiwalled carbon nanotubes/graphene nanoplatelets (MWCNT/GNP)-based nanofluids are computed by incorporating the influence of several physical mechanisms, including interfacial nanolayering. The accuracy of tested computational approaches is evaluated by considering particle concentration and Reynolds number ranges of 0.075–0.25 wt% and 200–470, respectively. The results demonstrate that for all nanofluid combinations and operational conditions, the Lagrangian–Eulerian approximation provides the most accurate convective heat transfer coefficient values with a maximum deviation of 5.34% for 0.25 wt% of MWCNT–water nanofluid at the largest Reynolds number, while single-phase and Eulerian–Eulerian multiphase models accurately estimate the thermal fields of the diluted nanofluids at low Reynolds numbers, but overestimate the results for denser nanofluids at high Reynolds numbers.https://www.mdpi.com/2079-4991/11/2/277nanofluidsinterfacial nanolayeringnonspherical nanoparticleshomogeneousEulerian–EulerianLagrangian–Eulerian |
| spellingShingle | Tehmina Ambreen Arslan Saleem Cheol Woo Park Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering Nanomaterials nanofluids interfacial nanolayering nonspherical nanoparticles homogeneous Eulerian–Eulerian Lagrangian–Eulerian |
| title | Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering |
| title_full | Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering |
| title_fullStr | Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering |
| title_full_unstemmed | Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering |
| title_short | Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering |
| title_sort | homogeneous and multiphase analysis of nanofluids containing nonspherical mwcnt and gnp nanoparticles considering the influence of interfacial layering |
| topic | nanofluids interfacial nanolayering nonspherical nanoparticles homogeneous Eulerian–Eulerian Lagrangian–Eulerian |
| url | https://www.mdpi.com/2079-4991/11/2/277 |
| work_keys_str_mv | AT tehminaambreen homogeneousandmultiphaseanalysisofnanofluidscontainingnonsphericalmwcntandgnpnanoparticlesconsideringtheinfluenceofinterfaciallayering AT arslansaleem homogeneousandmultiphaseanalysisofnanofluidscontainingnonsphericalmwcntandgnpnanoparticlesconsideringtheinfluenceofinterfaciallayering AT cheolwoopark homogeneousandmultiphaseanalysisofnanofluidscontainingnonsphericalmwcntandgnpnanoparticlesconsideringtheinfluenceofinterfaciallayering |