Issues on numerical modelling of transport processes in granular reactive media -- an approach with thermal relaxation.
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| Title: | Issues on numerical modelling of transport processes in granular reactive media -- an approach with thermal relaxation. |
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| Authors: | Polesek-Karczewska, Sylwia1 sylwia.polesek-karczewska@imp.gda.pl, Kardaś, Dariusz1 |
| Source: | Archives of Thermodynamics. 2024, Vol. 45 Issue 3, p5-12. 8p. |
| Subjects: | One-dimensional flow, Temperature distribution, Granular materials, Theory of wave motion, Energy industries |
| Abstract: | The steadily growing interest in applying granular media in various novel and advanced technologies, particularly in the energy sector, entails the need to gain in-depth knowledge of their thermal and flow behaviour and develop simulation predictive tools for systems' design and optimisation. The focus of the present study is on the numerical modelling of the thermal decomposition of solid fuel grains in a packed bed while considering a non-classical description of heat transfer in such a medium. The work aims to assess the influence of the relaxation time and thermo-physical properties of the medium on the nature of the solution and highlight the factors that are the source of local non-equilibrium affecting thermal wave speed propagation. The analysis of the predicted temperature distribution was carried out based on the developed transient one-dimensional thermal and flow model, taking into account the moisture evaporation and the devolatilization of fuel particles. Obtained simulation results showed a significant increase in the temperature gradients with increased relaxation times for the case of wet granular bed. They also demonstrated the variable dynamics of thermal wave propagation due to the change in the packed bed structure with the process progress. For a relaxation time of 100 s, a several-fold increase in the temperature signal propagation speed during the fuel bed thermal decomposition was predicted. [ABSTRACT FROM AUTHOR] |
| Copyright of Archives of Thermodynamics is the property of Szewalski Institute of Fluid-Flow Machinery 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 | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 179019654 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Issues on numerical modelling of transport processes in granular reactive media -- an approach with thermal relaxation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Polesek-Karczewska%2C+Sylwia%22">Polesek-Karczewska, Sylwia</searchLink><relatesTo>1</relatesTo><i> sylwia.polesek-karczewska@imp.gda.pl</i><br /><searchLink fieldCode="AR" term="%22Kardaś%2C+Dariusz%22">Kardaś, Dariusz</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Archives+of+Thermodynamics%22">Archives of Thermodynamics</searchLink>. 2024, Vol. 45 Issue 3, p5-12. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22One-dimensional+flow%22">One-dimensional flow</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+distribution%22">Temperature distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Granular+materials%22">Granular materials</searchLink><br /><searchLink fieldCode="DE" term="%22Theory+of+wave+motion%22">Theory of wave motion</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+industries%22">Energy industries</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The steadily growing interest in applying granular media in various novel and advanced technologies, particularly in the energy sector, entails the need to gain in-depth knowledge of their thermal and flow behaviour and develop simulation predictive tools for systems' design and optimisation. The focus of the present study is on the numerical modelling of the thermal decomposition of solid fuel grains in a packed bed while considering a non-classical description of heat transfer in such a medium. The work aims to assess the influence of the relaxation time and thermo-physical properties of the medium on the nature of the solution and highlight the factors that are the source of local non-equilibrium affecting thermal wave speed propagation. The analysis of the predicted temperature distribution was carried out based on the developed transient one-dimensional thermal and flow model, taking into account the moisture evaporation and the devolatilization of fuel particles. Obtained simulation results showed a significant increase in the temperature gradients with increased relaxation times for the case of wet granular bed. They also demonstrated the variable dynamics of thermal wave propagation due to the change in the packed bed structure with the process progress. For a relaxation time of 100 s, a several-fold increase in the temperature signal propagation speed during the fuel bed thermal decomposition was predicted. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Archives of Thermodynamics is the property of Szewalski Institute of Fluid-Flow Machinery 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: 10.24425/ather.2024.150450 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 5 Subjects: – SubjectFull: One-dimensional flow Type: general – SubjectFull: Temperature distribution Type: general – SubjectFull: Granular materials Type: general – SubjectFull: Theory of wave motion Type: general – SubjectFull: Energy industries Type: general Titles: – TitleFull: Issues on numerical modelling of transport processes in granular reactive media -- an approach with thermal relaxation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Polesek-Karczewska, Sylwia – PersonEntity: Name: NameFull: Kardaś, Dariusz IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: 2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 12310956 Numbering: – Type: volume Value: 45 – Type: issue Value: 3 Titles: – TitleFull: Archives of Thermodynamics Type: main |
| ResultId | 1 |
