Method of determining thermal diffusivity on the basis of measurements of linear displacements.
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| Title: | Method of determining thermal diffusivity on the basis of measurements of linear displacements. |
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| Authors: | Pawlik, Kamil1 (AUTHOR), Kucharczyk, Andrzej1 (AUTHOR) a.kucharczyk@po.edu.pl, Podpora, Michal2 (AUTHOR) |
| Source: | Measurement (02632241). Apr2023, Vol. 211, pN.PAG-N.PAG. 1p. |
| Subjects: | Thermal diffusivity, Length measurement, Displacement (Mechanics), Thermal conductivity, Specific heat, Measuring instruments |
| Abstract: | [Display omitted] • Determination of the thermal properties of a material is possible by measuring only the shortening of the sample during cooling. • Determination of thermal diffusivity does not require monitoring of sample temperature changes or heat fluxes. • The proposed method allows to simultaneously determine the thermal diffusivity and the coefficient of thermal expansion. An innovative, relatively simple method of non-stationary determination of thermal diffusivity with the use of linear displacement measurements is proposed. This method is dedicated mostly to materials with an extensive internal structure (porous building materials, i.e. concrete, ceramics, wood, etc.), where the thermal parameters should take into account the heterogeneity of the structure (relatively large samples are required). The main difference between the proposed method and the methods known from the literature is that in order to determine the thermal diffusivity, it is only necessary to measure changes in the length of the sample during cooling or heating. This is an alternative to methods based on direct or indirect measurement of the surface temperature of the sample. The proposed method was tested on samples made of plexiglass. The obtained results were compared with the reference results obtained from measurements with the use of commercial measuring equipment (Netzsch HFM 446), which allows to determine the thermal conductivity coefficient and specific heat with high accuracy. Good agreement of the obtained results was obtained. The uncertainty analysis of the proposed method showed that it is at the level of 3 %, which is sufficient in the case of building materials. [ABSTRACT FROM AUTHOR] |
| Copyright of Measurement (02632241) is the property of Elsevier B.V. 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: 162592737 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Method of determining thermal diffusivity on the basis of measurements of linear displacements. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pawlik%2C+Kamil%22">Pawlik, Kamil</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kucharczyk%2C+Andrzej%22">Kucharczyk, Andrzej</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> a.kucharczyk@po.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Podpora%2C+Michal%22">Podpora, Michal</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Measurement+%2802632241%29%22">Measurement (02632241)</searchLink>. Apr2023, Vol. 211, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Thermal+diffusivity%22">Thermal diffusivity</searchLink><br /><searchLink fieldCode="DE" term="%22Length+measurement%22">Length measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Displacement+%28Mechanics%29%22">Displacement (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Specific+heat%22">Specific heat</searchLink><br /><searchLink fieldCode="DE" term="%22Measuring+instruments%22">Measuring instruments</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: [Display omitted] • Determination of the thermal properties of a material is possible by measuring only the shortening of the sample during cooling. • Determination of thermal diffusivity does not require monitoring of sample temperature changes or heat fluxes. • The proposed method allows to simultaneously determine the thermal diffusivity and the coefficient of thermal expansion. An innovative, relatively simple method of non-stationary determination of thermal diffusivity with the use of linear displacement measurements is proposed. This method is dedicated mostly to materials with an extensive internal structure (porous building materials, i.e. concrete, ceramics, wood, etc.), where the thermal parameters should take into account the heterogeneity of the structure (relatively large samples are required). The main difference between the proposed method and the methods known from the literature is that in order to determine the thermal diffusivity, it is only necessary to measure changes in the length of the sample during cooling or heating. This is an alternative to methods based on direct or indirect measurement of the surface temperature of the sample. The proposed method was tested on samples made of plexiglass. The obtained results were compared with the reference results obtained from measurements with the use of commercial measuring equipment (Netzsch HFM 446), which allows to determine the thermal conductivity coefficient and specific heat with high accuracy. Good agreement of the obtained results was obtained. The uncertainty analysis of the proposed method showed that it is at the level of 3 %, which is sufficient in the case of building materials. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Measurement (02632241) is the property of Elsevier B.V. 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=162592737 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.measurement.2023.112624 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Thermal diffusivity Type: general – SubjectFull: Length measurement Type: general – SubjectFull: Displacement (Mechanics) Type: general – SubjectFull: Thermal conductivity Type: general – SubjectFull: Specific heat Type: general – SubjectFull: Measuring instruments Type: general Titles: – TitleFull: Method of determining thermal diffusivity on the basis of measurements of linear displacements. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pawlik, Kamil – PersonEntity: Name: NameFull: Kucharczyk, Andrzej – PersonEntity: Name: NameFull: Podpora, Michal IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 02632241 Numbering: – Type: volume Value: 211 Titles: – TitleFull: Measurement (02632241) Type: main |
| ResultId | 1 |
