On the dynamic thermal conductivity and diffusivity observed in heat pulse experiments

https://m2.mtmt.hu/ eng 2026-06-27 19:38 JournalArticle 34733253 ADMIN_APPROVED true 0 false 2026-06-23T14:15:21.961+0000 2025-05-08T14:15:52.253+0000 2024-03-12T11:39:45.496+0000 true 10068078 Fehér Anna Éva /api/author/10068078 Author Anna Éva Fehér (Hőtechnika) true 2025-10-06T08:52:17.639+0000 2025-02-21T00:32:15.294+0000 true 10065569 Pécsi Éva /api/admin/10065569 Admin Éva Pécsi (MTMT Közp 2,3, admin) true Admin 10065569 /api/admin/10065569 Éva Pécsi (MTMT Közp 2,3, admin) Pécsi Éva true true 2025-02-21T11:16:47.121+0000 true false true 24 24 /api/publicationtype/24 PublicationType Journal Article 1 true 24 JournalArticle true 10000059 Article true 24 24 /api/publicationtype/24 PublicationType Journal Article 1 true 24 JournalArticle /api/subtype/10000059 Szakcikk SubType Article (Journal Article) 101 true 10000059 true 1 /api/category/1 Category Scientific true 1 Fehér, Anna On the dynamic thermal conductivity and diffusivity observed in heat pulse experiments true true /api/journal/2715 REVIEWED JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS 0340-0204 1437-4358 true false 2715 false 2715 true 0340-0204 1437-4358 Journal FOREIGN 49 2 161 170 161 10 2024 Determining the thermal properties of materials with complex structures is still a major engineering challenge today. The well-known heat pulse experiment can be used to determine the thermal diffusivity by measuring the temperature history as a thermal response for a fast excitation. However, the evaluation of the measurements can be challenging, especially when dealing with non-homogeneous samples. The thermal behavior of such heterogeneous materials may exhibit a response including two-time scales. Therefore, the Fourier equation is not necessarily applicable. The simplest possible alternatives are the 2-temperature models the Guyer–Krumhansl and Jeffreys heat equations. In the present paper, we focus on the interpretation of the Jeffreys heat equation; studying its analytical solution, we present a fitting method for determining the unknown parameters. We also discuss its relation with the other two heat equations, and we offer an interpretation of how to characterize the transient response of heterogeneous materials. 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Gravitációfizikai kutatócsoport (RMI / ELMO) 2 12 2 2 0 true 10065569 Language 10002 /api/language/10002 English Angol English true 2 true PersonAuthorship 115791091 /api/authorship/115791091 Fehér, Anna ✉ [Fehér, Anna Éva (Hőtechnika), author] Department of Energy Engineering (BUTE / FME) 1 0.5 true false true Author 10068078 /api/author/10068078 Anna Éva Fehér (Hőtechnika) Fehér Anna Éva true true Fehér Anna true false false AuthorshipType 1 /api/authorshiptype/1 Author 0 true 0 true false true PersonAuthorship 115791092 /api/authorship/115791092 Kovács, Róbert [Kovács, Róbert Sándor (termodinamika), author] Department of Energy Engineering (BUTE / FME); Gravitational Physics Research Group (RMI / ELMO) 2 0.5 false true false Author 10049605 /api/author/10049605 Róbert Sándor Kovács (termodinamika) Kovács Róbert Sándor true 10049605 true Kovács Róbert true false false AuthorshipType 1 /api/authorshiptype/1 Author 0 true 0 true false true PublicationIdentifier 25853035 /api/publicationidentifier/25853035 DOI: 10.1515/jnet-2023-0119 PlainSource 6 /api/publicationsource/6 DOI PublicationSourceType 10001 /api/publicationsourcetype/10001 DOI true true true DOI DOI https://doi.org/@@@ true true 6 true IDENTICAL 10.1515/jnet-2023-0119 https://doi.org/10.1515/jnet-2023-0119 false true PublicationIdentifier 25937312 /api/publicationidentifier/25937312 WoS: 001182097800001 PlainSource 1 /api/publicationsource/1 WoS PublicationSourceType 10003 /api/publicationsourcetype/10003 Indexelő adatbázis false true true WoS WoS https://www.webofscience.com/wos/woscc/full-record/@@@ true true 1 true IDENTICAL 001182097800001 https://www.webofscience.com/wos/woscc/full-record/001182097800001 false true PublicationIdentifier 28047696 /api/publicationidentifier/28047696 REAL: 210573 SwordSource 36 /api/publicationsource/36 REAL PublicationSourceType 10007 /api/publicationsourcetype/10007 Repozitórium true true true REAL REAL https://real.mtak.hu/@@@ true true 36 true CLOSED 210573 https://real.mtak.hu/210573 false true PublicationIdentifier 25900487 /api/publicationidentifier/25900487 Scopus: 85187682171 PlainSource 3 /api/publicationsource/3 Scopus PublicationSourceType 10003 /api/publicationsourcetype/10003 Indexelő adatbázis false true true Scopus Scopus http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-@@@ true true 3 true IDENTICAL 85187682171 http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85187682171 false true PublicationIdentifier 25853036 /api/publicationidentifier/25853036 Other URL: https://www.degruyter.com/document/doi/10.1515/jnet-2023-0119/html PlainSource 40 /api/publicationsource/40 Other URL PublicationSourceType 10006 /api/publicationsourcetype/10006 Link true true true Egyéb URL Other URL @@@ true true 40 true https://www.degruyter.com/document/doi/10.1515/jnet-2023-0119/html https://www.degruyter.com/document/doi/10.1515/jnet-2023-0119/html false true PublicationIdentifier 29325949 /api/publicationidentifier/29325949 Other URL: https://phd.gpk.bme.hu/pub/s/j/l9/t3?3001174 PlainSource 40 /api/publicationsource/40 Other URL PublicationSourceType 10006 /api/publicationsourcetype/10006 Link true true true Egyéb URL Other URL @@@ true true 40 true https://phd.gpk.bme.hu/pub/s/j/l9/t3?3001174 https://phd.gpk.bme.hu/pub/s/j/l9/t3?3001174 true true PublicationIdentifier 29951869 /api/publicationidentifier/29951869 Other URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187682171&doi=10.1515%2Fjnet-2023-0119&partnerID=40&md5=6fe85868b041d5354ec85094dd80d878 PlainSource 40 /api/publicationsource/40 Other URL PublicationSourceType 10006 /api/publicationsourcetype/10006 Link true true true Egyéb URL Other URL @@@ true true 40 true NONE IDENTICAL https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187682171&doi=10.1515%2Fjnet-2023-0119&partnerID=40&md5=6fe85868b041d5354ec85094dd80d878 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187682171&doi=10.1515%2Fjnet-2023-0119&partnerID=40&md5=6fe85868b041d5354ec85094dd80d878 false true Classification 10984 /api/classification/10984 Mechanical engineering true true SjrRating 11447874 /api/sjrrating/11447874 sjr:Q2 (2024) Scopus - Chemistry (miscellaneous) JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS 0340-0204 1437-4358 209 0.49 journal RatingType 10002 /api/ratingtype/10002 sjr sjr true true ClassificationExternal 1601 /api/classificationexternal/1601 Scopus - Chemistry (miscellaneous) true 1601 true Q2 DIRECT true true Reference 50926530 /api/reference/50926530 1. 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(2024) JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS 0340-0204 1437-4358 49 2 161-170<div class="JournalArticle Publication long-list"> <div class="authors"> <img title="Forrásközlemény" style="float: left" src="/frontend/resources/grid/publication-core-icon.png"> <img title="Idézőközlemény" style="float: left" src="/frontend/resources/grid/publication-citation-icon.png"> <div class="autype autype0"> <span class="author-name" mtid="10068078"><a href="/gui2/?type=authors&mode=browse&sel=10068078" target="_blank">Fehér Anna ✉ (<span class="authorship-author-name">Fehér Anna Éva</span> <span class="authorAux-mtmt"> Hőtechnika</span>) </a> </span> <span class="author-affil"><span title="Budapest University of Technology and Economics">BUTE</span>/<span title="Faculty of Mechanical Engineering">FME</span>/Department of Energy Engineering</span> ;    <span class="author-name" mtid="10049605"><a href="/gui2/?type=authors&mode=browse&sel=10049605" target="_blank">Kovács Róbert (<span class="authorship-author-name">Kovács Róbert Sándor</span> <span class="authorAux-mtmt"> termodinamika</span>) </a> </span> <span class="author-affil"><span title="Budapest University of Technology and Economics">BUTE</span>/<span title="Faculty of Mechanical Engineering">FME</span>/Department of Energy Engineering; <span title="HUN-REN Wigner Research Centre for Physics">HUN-REN WIGNER</span>/<span title="Institute for Particle and Nuclear Physics">RMI</span>/<span title="Theoretical Physics Department">ELMO</span>/Gravitational Physics Research Group</span> </div> </div> <div class="title"><a href="/gui2/?mode=browse&params=publication;34733253" target="_blank">On the dynamic thermal conductivity and diffusivity observed in heat pulse experiments</a></div> <div> <span class="journal-title">JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS</span> <span class="journal-issn">(<a target="_blank" href="https://portal.issn.org/resource/ISSN/0340-0204">0340-0204</a> <a target="_blank" href="https://portal.issn.org/resource/ISSN/1437-4358">1437-4358</a>)</span>: <span class="journal-volume">49</span> <span class="journal-issue">2</span> <span class="page"> pp 161-170 </span> <span class="year">(2024)</span> </div> <div class="pub-footer"> <span class="language" xmlns="http://www.w3.org/1999/html">Language: English | </span> <span class="identifiers"> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="10.1515/jnet-2023-0119" target="_blank" href="https://doi.org/10.1515/jnet-2023-0119"> DOI </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="001182097800001" target="_blank" href="https://www.webofscience.com/wos/woscc/full-record/001182097800001"> WoS </a> </span> <span class="id identifier oa_CLOSED" title=" Closed "> <a style="color:black" title="210573" target="_blank" href="https://real.mtak.hu/210573"> REAL </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="85187682171" target="_blank" href="http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85187682171"> Scopus </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:black" title="https://www.degruyter.com/document/doi/10.1515/jnet-2023-0119/html" target="_blank" href="https://www.degruyter.com/document/doi/10.1515/jnet-2023-0119/html"> Other URL </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:black" title="https://phd.gpk.bme.hu/pub/s/j/l9/t3?3001174" target="_blank" href="https://phd.gpk.bme.hu/pub/s/j/l9/t3?3001174"> Other URL </a> </span> <span class="id identifier oa_NONE" title=" None "> <a style="color:blue" title="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187682171&doi=10.1515%2Fjnet-2023-0119&partnerID=40&md5=6fe85868b041d5354ec85094dd80d878" target="_blank" href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187682171&doi=10.1515%2Fjnet-2023-0119&partnerID=40&md5=6fe85868b041d5354ec85094dd80d878"> Other URL </a> </span> </span> <OnlyViewableByAuthor><div class="ratings"> <div class="journal-subject">Journal subject: Scopus - Chemistry (miscellaneous)   Rank: Q2</div> <div class="journal-subject">Journal subject: Scopus - Physics and Astronomy (miscellaneous)   Rank: Q2</div> </div></OnlyViewableByAuthor> <div class="publication-citation" style="margin-left: 0.5cm;"> <span title="" class="citingPub-count">Citing papers: 3</span> | Independent citation: 1 | Self citation: 2 | Unknown citation: 0 | Number of citations in WoS: 2 | Number of citations in Scopus: 2 | WoS/Scopus assigned: 2 | Number of citations with DOI: 2 </div> <div class="publication-citation"> <a target="_blank" href="/api/publication?cond=citations.related;eq;34733253&sort=publishedYear,desc&sort=title"> Number of cited publications: 9 </a> </div> <div class="mtid"><span class="long-pub-mtid">Publication: 34733253</span> | <span class="status-data status-ADMIN_APPROVED"> Admin approved </span> Core Citing | <span class="type-subtype">Journal Article ( Article ) </span> | <span class="pub-category">Scientific</span> | <span class="publication-sourceOfData">kézi felvitel</span> </div> <div class="funder"> (FK 134277) Funder: NRDIO, (ÚNKP-23-3-II-BME-54) </div> <div class="notDuplums"><a target="_blank" href="/api/publication/34733253/notduplums">350 marked as not duplum</a> </div> <div class="lastModified">Last Modified: 2025.05.08. 16:15 Katalin Andódy (BME admin4) </div> <div class="lockedBy">Centrally managed 2025.02.21. 12:16 Éva Pécsi (MTMT Közp 2,3, admin) </div> </div></div>