Mechanism of heat capacity enhancement in molten salt nanofluids.
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| Title: | Mechanism of heat capacity enhancement in molten salt nanofluids. |
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| Authors: | Rizvi, Syed Muhammad Mujtaba1 (AUTHOR), Shin, Donghyun1 (AUTHOR) shin1d@cmich.edu |
| Source: | International Journal of Heat & Mass Transfer. Nov2020, Vol. 161, pN.PAG-N.PAG. 1p. |
| Subjects: | Heat capacity, Nanofluids, Fused salts, Dendritic crystals, Heterogenous nucleation, Discontinuous precipitation |
| Abstract: | • Large variations in heat capacity enhancements were observed for various molten salt nanofluids. • 25% enhanced heat capacity observed in a molten salt nanofluid with dendritic nanostructure formation. • No significant heat capacity change observed in a molten slat nanofluid without dendritic nanostructure formation. • Material characterization discovered diluting the nanofluid sample with water hindered already formed dendritic nanostructures. • Inadequate control of moisture could be one reason behind the large variations in heat capacity enhancements between research groups. Recent studies (Shin et al., 2014; Tiznobaik and Shin, 2013) in molten salt nanofluids have discussed the possibility of the development of nano dendritic structures as a mechanism behind heat capacity enhancements. It is established that these nanostructures enhance heat capacity due to their increased surface area. Shin et al. explained that these structures might be resulting from micro-segregation in salt eutectic due to differences in the level of attraction between different types of salts and nanoparticles. However, it does not explain how this segregated salt develops into dendrites. In this study, Tiznobaik's work is further exploited and explained based on nucleation and grain growth of nucleated salt. It is proposed that segregated nucleate on the surface of nanoparticles via heterogeneous nucleation and grow into dendritic through single-dimensional grain growth. Experimental verification for heat capacity enhancement performed on differential scanning calorimeter (DSC). Transmission electron miscroscope (TEM) was employed imaging dendritic strcutures. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science 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: 145938586 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mechanism of heat capacity enhancement in molten salt 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="%22Shin%2C+Donghyun%22">Shin, Donghyun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> shin1d@cmich.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Heat+%26+Mass+Transfer%22">International Journal of Heat & Mass Transfer</searchLink>. Nov2020, Vol. 161, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Heat+capacity%22">Heat capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofluids%22">Nanofluids</searchLink><br /><searchLink fieldCode="DE" term="%22Fused+salts%22">Fused salts</searchLink><br /><searchLink fieldCode="DE" term="%22Dendritic+crystals%22">Dendritic crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Heterogenous+nucleation%22">Heterogenous nucleation</searchLink><br /><searchLink fieldCode="DE" term="%22Discontinuous+precipitation%22">Discontinuous precipitation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: • Large variations in heat capacity enhancements were observed for various molten salt nanofluids. • 25% enhanced heat capacity observed in a molten salt nanofluid with dendritic nanostructure formation. • No significant heat capacity change observed in a molten slat nanofluid without dendritic nanostructure formation. • Material characterization discovered diluting the nanofluid sample with water hindered already formed dendritic nanostructures. • Inadequate control of moisture could be one reason behind the large variations in heat capacity enhancements between research groups. Recent studies (Shin et al., 2014; Tiznobaik and Shin, 2013) in molten salt nanofluids have discussed the possibility of the development of nano dendritic structures as a mechanism behind heat capacity enhancements. It is established that these nanostructures enhance heat capacity due to their increased surface area. Shin et al. explained that these structures might be resulting from micro-segregation in salt eutectic due to differences in the level of attraction between different types of salts and nanoparticles. However, it does not explain how this segregated salt develops into dendrites. In this study, Tiznobaik's work is further exploited and explained based on nucleation and grain growth of nucleated salt. It is proposed that segregated nucleate on the surface of nanoparticles via heterogeneous nucleation and grow into dendritic through single-dimensional grain growth. Experimental verification for heat capacity enhancement performed on differential scanning calorimeter (DSC). Transmission electron miscroscope (TEM) was employed imaging dendritic strcutures. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science 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: 10.1016/j.ijheatmasstransfer.2020.120260 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Heat capacity Type: general – SubjectFull: Nanofluids Type: general – SubjectFull: Fused salts Type: general – SubjectFull: Dendritic crystals Type: general – SubjectFull: Heterogenous nucleation Type: general – SubjectFull: Discontinuous precipitation Type: general Titles: – TitleFull: Mechanism of heat capacity enhancement in molten salt nanofluids. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rizvi, Syed Muhammad Mujtaba – PersonEntity: Name: NameFull: Shin, Donghyun IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 00179310 Numbering: – Type: volume Value: 161 Titles: – TitleFull: International Journal of Heat & Mass Transfer Type: main |
| ResultId | 1 |
