Heat capacity and viscosity of ternary carbonate nanofluids.
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| Title: | Heat capacity and viscosity of ternary carbonate nanofluids. |
|---|---|
| Authors: | Rizvi, Syed Muhammad Mujtaba1 (AUTHOR), El Far, Baha1 (AUTHOR), Shin, Donghyun1 (AUTHOR) shin@cmich.edu |
| Source: | International Journal of Energy Research. 3/25/2021, Vol. 45 Issue 4, p6350-6359. 10p. |
| Subjects: | Heat capacity, Pseudoplastic fluids, Nanofluids, Dendritic crystals, Transmission electron microscopes, Differential scanning calorimetry, Viscosity |
| Abstract: | Summary: Recent studies have shown that eutectic salt mixtures show remarkable enhancement in heat capacity after nanoparticles are dispersed at small concentrations. The exact mechanism behind these heat capacity enhancements is still inconclusive. However, recent studies proposed that the enhancement could be associated with nucleation and grain growth of salt dendritic structures. To investigate the hypothesis, we synthesized several samples of ternary carbonate salt mixture doped with 1% alumina nanoparticles and thermally cycled them at various heating rates and cooled them back to the solid‐state during the synthesis procedure. It can affect the nucleation/grain growth of salt dendritic nanostructures and, as a result, there can be different heat capacity enhancements. A differential scanning calorimetry was employed to characterize the heat capacity values of the systems. It was observed that the heat capacity enhancements decreased with increases in the heating rates. The highest heat capacity enhancement was observed at the lowest heating rate (ie, 2°C/min). A transmission electron microscope was employed to confirm the effect of heating cycling rates on the formation of dendritic structures. Moreover, pH variation method was used to study the effect of the dendritic structures on the heat capacity of the mixture. Furthermore, a rheometer was employed to characterize the rheological behavior. It was observed that nanofluid samples showed shear‐thinning behavior, whereas shear thinning was not observed in pure and nanofluid prepared with the pH variation method. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Energy Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 149284986 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Heat capacity and viscosity of ternary carbonate nanofluids. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Rizvi%2C+Syed+Muhammad+Mujtaba%22">Rizvi, Syed Muhammad Mujtaba</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22El+Far%2C+Baha%22">El Far, Baha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shin%2C+Donghyun%22">Shin, Donghyun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> shin@cmich.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Energy+Research%22">International Journal of Energy Research</searchLink>. 3/25/2021, Vol. 45 Issue 4, p6350-6359. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Heat+capacity%22">Heat capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Pseudoplastic+fluids%22">Pseudoplastic fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofluids%22">Nanofluids</searchLink><br /><searchLink fieldCode="DE" term="%22Dendritic+crystals%22">Dendritic crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopes%22">Transmission electron microscopes</searchLink><br /><searchLink fieldCode="DE" term="%22Differential+scanning+calorimetry%22">Differential scanning calorimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Summary: Recent studies have shown that eutectic salt mixtures show remarkable enhancement in heat capacity after nanoparticles are dispersed at small concentrations. The exact mechanism behind these heat capacity enhancements is still inconclusive. However, recent studies proposed that the enhancement could be associated with nucleation and grain growth of salt dendritic structures. To investigate the hypothesis, we synthesized several samples of ternary carbonate salt mixture doped with 1% alumina nanoparticles and thermally cycled them at various heating rates and cooled them back to the solid‐state during the synthesis procedure. It can affect the nucleation/grain growth of salt dendritic nanostructures and, as a result, there can be different heat capacity enhancements. A differential scanning calorimetry was employed to characterize the heat capacity values of the systems. It was observed that the heat capacity enhancements decreased with increases in the heating rates. The highest heat capacity enhancement was observed at the lowest heating rate (ie, 2°C/min). A transmission electron microscope was employed to confirm the effect of heating cycling rates on the formation of dendritic structures. Moreover, pH variation method was used to study the effect of the dendritic structures on the heat capacity of the mixture. Furthermore, a rheometer was employed to characterize the rheological behavior. It was observed that nanofluid samples showed shear‐thinning behavior, whereas shear thinning was not observed in pure and nanofluid prepared with the pH variation method. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Energy Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/er.6148 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 6350 Subjects: – SubjectFull: Heat capacity Type: general – SubjectFull: Pseudoplastic fluids Type: general – SubjectFull: Nanofluids Type: general – SubjectFull: Dendritic crystals Type: general – SubjectFull: Transmission electron microscopes Type: general – SubjectFull: Differential scanning calorimetry Type: general – SubjectFull: Viscosity Type: general Titles: – TitleFull: Heat capacity and viscosity of ternary carbonate nanofluids. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rizvi, Syed Muhammad Mujtaba – PersonEntity: Name: NameFull: El Far, Baha – PersonEntity: Name: NameFull: Shin, Donghyun IsPartOfRelationships: – BibEntity: Dates: – D: 25 M: 03 Text: 3/25/2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 0363907X Numbering: – Type: volume Value: 45 – Type: issue Value: 4 Titles: – TitleFull: International Journal of Energy Research Type: main |
| ResultId | 1 |
