Effects of fluctuating heat flux on natural convection of Al2O3 and Cu nanofluids in a square enclosure: a lattice Boltzmann study
The natural convective heat transfer inside a square enclosure containing Al 2 O 3 and Cu nanofluids has been studied using Lattice Boltzmann method. A nonuniform sinusoidal heat flux was applied on one of the side boundaries. The calculated results and experimental data were in good agreement. Impa...
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| Veröffentlicht in: | Journal of thermal analysis and calorimetry 2023-09, Vol.148 (18), p.9435-9452 |
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| creator | Doostali, Ali Madadelahi, Masoud Namazi, Mohammadmehdi Azizi, Mina |
| description | The natural convective heat transfer inside a square enclosure containing Al
2
O
3
and Cu nanofluids has been studied using Lattice Boltzmann method. A nonuniform sinusoidal heat flux was applied on one of the side boundaries. The calculated results and experimental data were in good agreement. Impacts of Rayleigh (Ra) number (10
5
–10
7
), nanoparticles solid volume fraction or SVF (0.01–0.1), and local oscillation wavelengths for wall heat flux (0.1, 0.5, and 1) on thermal and flow patterns have been studied. It was shown that an increase in SVF (0.01–0.1) and Ra number (10
5
–10
7
) for Cu nanofluids decreases the maximum wall temperature by 48.3 and 49.2%, respectively. In addition, for the same oscillation wavelength and Ra number, Cu-water nanofluid has about 30% higher rate of heat transfer compared to Al
2
O
3
-water. With an increase in SVF at low Ra number, the heat tends to be transferred at a constant rate. The enclosure containing Al
2
O
3
-water has lower absolute stream function values than Cu-water nanofluid by 26.6%. |
| doi_str_mv | 10.1007/s10973-023-12324-9 |
| format | Article |
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2
O
3
and Cu nanofluids has been studied using Lattice Boltzmann method. A nonuniform sinusoidal heat flux was applied on one of the side boundaries. The calculated results and experimental data were in good agreement. Impacts of Rayleigh (Ra) number (10
5
–10
7
), nanoparticles solid volume fraction or SVF (0.01–0.1), and local oscillation wavelengths for wall heat flux (0.1, 0.5, and 1) on thermal and flow patterns have been studied. It was shown that an increase in SVF (0.01–0.1) and Ra number (10
5
–10
7
) for Cu nanofluids decreases the maximum wall temperature by 48.3 and 49.2%, respectively. In addition, for the same oscillation wavelength and Ra number, Cu-water nanofluid has about 30% higher rate of heat transfer compared to Al
2
O
3
-water. With an increase in SVF at low Ra number, the heat tends to be transferred at a constant rate. The enclosure containing Al
2
O
3
-water has lower absolute stream function values than Cu-water nanofluid by 26.6%.</description><identifier>ISSN: 1388-6150</identifier><identifier>EISSN: 1588-2926</identifier><identifier>DOI: 10.1007/s10973-023-12324-9</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Aluminum oxide ; Analytical Chemistry ; Chemistry ; Chemistry and Materials Science ; Convective heat transfer ; Enclosures ; Flow distribution ; Free convection ; Heat flux ; Inorganic Chemistry ; Measurement Science and Instrumentation ; Nanofluids ; Nanoparticles ; Physical Chemistry ; Polymer Sciences ; Wall temperature</subject><ispartof>Journal of thermal analysis and calorimetry, 2023-09, Vol.148 (18), p.9435-9452</ispartof><rights>Akadémiai Kiadó, Budapest, Hungary 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-e4d486d7853b83b01ba160f515008c6ffb1cacbde9534c0d684727daebf40e0a3</citedby><cites>FETCH-LOGICAL-c319t-e4d486d7853b83b01ba160f515008c6ffb1cacbde9534c0d684727daebf40e0a3</cites><orcidid>0000-0002-5301-3994</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10973-023-12324-9$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10973-023-12324-9$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Doostali, Ali</creatorcontrib><creatorcontrib>Madadelahi, Masoud</creatorcontrib><creatorcontrib>Namazi, Mohammadmehdi</creatorcontrib><creatorcontrib>Azizi, Mina</creatorcontrib><title>Effects of fluctuating heat flux on natural convection of Al2O3 and Cu nanofluids in a square enclosure: a lattice Boltzmann study</title><title>Journal of thermal analysis and calorimetry</title><addtitle>J Therm Anal Calorim</addtitle><description>The natural convective heat transfer inside a square enclosure containing Al
2
O
3
and Cu nanofluids has been studied using Lattice Boltzmann method. A nonuniform sinusoidal heat flux was applied on one of the side boundaries. The calculated results and experimental data were in good agreement. Impacts of Rayleigh (Ra) number (10
5
–10
7
), nanoparticles solid volume fraction or SVF (0.01–0.1), and local oscillation wavelengths for wall heat flux (0.1, 0.5, and 1) on thermal and flow patterns have been studied. It was shown that an increase in SVF (0.01–0.1) and Ra number (10
5
–10
7
) for Cu nanofluids decreases the maximum wall temperature by 48.3 and 49.2%, respectively. In addition, for the same oscillation wavelength and Ra number, Cu-water nanofluid has about 30% higher rate of heat transfer compared to Al
2
O
3
-water. With an increase in SVF at low Ra number, the heat tends to be transferred at a constant rate. The enclosure containing Al
2
O
3
-water has lower absolute stream function values than Cu-water nanofluid by 26.6%.</description><subject>Aluminum oxide</subject><subject>Analytical Chemistry</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Convective heat transfer</subject><subject>Enclosures</subject><subject>Flow distribution</subject><subject>Free convection</subject><subject>Heat flux</subject><subject>Inorganic Chemistry</subject><subject>Measurement Science and Instrumentation</subject><subject>Nanofluids</subject><subject>Nanoparticles</subject><subject>Physical Chemistry</subject><subject>Polymer Sciences</subject><subject>Wall temperature</subject><issn>1388-6150</issn><issn>1588-2926</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLAzEUhYMoWKt_wFXA9ehNMk93tdQHFLrRdchkkjplmrR5iLr0l5s6gjtX93D4zr3cg9AlgWsCUN14Ak3FMqAsI5TRPGuO0IQUdZ3RhpbHSbOkS1LAKTrzfgMATQNkgr4WWisZPLYa6yHKEEXozRq_KhEOxju2BhsRohMDlta8JbhPVsJnA10xLEyH5zEhxia87zzuDRbY76NwCisjB-ujU7fJG0QIvVT4zg7hcyuMwT7E7uMcnWgxeHXxO6fo5X7xPH_MlquHp_lsmUlGmpCpvMvrsqvqgrU1a4G0gpSgi_QT1LLUuiVSyLZTTcFyCV1Z5xWtOqFanYMCwaboaty7c3YflQ98Y6Mz6SSndVGVhBFKE0VHSjrrvVOa71y_Fe6DE-CHrvnYNU9d85-ueZNCbAz5BJu1cn-r_0l9A4RFgyk</recordid><startdate>20230901</startdate><enddate>20230901</enddate><creator>Doostali, Ali</creator><creator>Madadelahi, Masoud</creator><creator>Namazi, Mohammadmehdi</creator><creator>Azizi, Mina</creator><general>Springer International Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-5301-3994</orcidid></search><sort><creationdate>20230901</creationdate><title>Effects of fluctuating heat flux on natural convection of Al2O3 and Cu nanofluids in a square enclosure: a lattice Boltzmann study</title><author>Doostali, Ali ; Madadelahi, Masoud ; Namazi, Mohammadmehdi ; Azizi, Mina</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-e4d486d7853b83b01ba160f515008c6ffb1cacbde9534c0d684727daebf40e0a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Aluminum oxide</topic><topic>Analytical Chemistry</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Convective heat transfer</topic><topic>Enclosures</topic><topic>Flow distribution</topic><topic>Free convection</topic><topic>Heat flux</topic><topic>Inorganic Chemistry</topic><topic>Measurement Science and Instrumentation</topic><topic>Nanofluids</topic><topic>Nanoparticles</topic><topic>Physical Chemistry</topic><topic>Polymer Sciences</topic><topic>Wall temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Doostali, Ali</creatorcontrib><creatorcontrib>Madadelahi, Masoud</creatorcontrib><creatorcontrib>Namazi, Mohammadmehdi</creatorcontrib><creatorcontrib>Azizi, Mina</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of thermal analysis and calorimetry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Doostali, Ali</au><au>Madadelahi, Masoud</au><au>Namazi, Mohammadmehdi</au><au>Azizi, Mina</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of fluctuating heat flux on natural convection of Al2O3 and Cu nanofluids in a square enclosure: a lattice Boltzmann study</atitle><jtitle>Journal of thermal analysis and calorimetry</jtitle><stitle>J Therm Anal Calorim</stitle><date>2023-09-01</date><risdate>2023</risdate><volume>148</volume><issue>18</issue><spage>9435</spage><epage>9452</epage><pages>9435-9452</pages><issn>1388-6150</issn><eissn>1588-2926</eissn><abstract>The natural convective heat transfer inside a square enclosure containing Al
2
O
3
and Cu nanofluids has been studied using Lattice Boltzmann method. A nonuniform sinusoidal heat flux was applied on one of the side boundaries. The calculated results and experimental data were in good agreement. Impacts of Rayleigh (Ra) number (10
5
–10
7
), nanoparticles solid volume fraction or SVF (0.01–0.1), and local oscillation wavelengths for wall heat flux (0.1, 0.5, and 1) on thermal and flow patterns have been studied. It was shown that an increase in SVF (0.01–0.1) and Ra number (10
5
–10
7
) for Cu nanofluids decreases the maximum wall temperature by 48.3 and 49.2%, respectively. In addition, for the same oscillation wavelength and Ra number, Cu-water nanofluid has about 30% higher rate of heat transfer compared to Al
2
O
3
-water. With an increase in SVF at low Ra number, the heat tends to be transferred at a constant rate. The enclosure containing Al
2
O
3
-water has lower absolute stream function values than Cu-water nanofluid by 26.6%.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s10973-023-12324-9</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-5301-3994</orcidid></addata></record> |
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| ispartof | Journal of thermal analysis and calorimetry, 2023-09, Vol.148 (18), p.9435-9452 |
| issn | 1388-6150 1588-2926 |
| language | eng |
| recordid | cdi_proquest_journals_2857613122 |
| source | SpringerLink Journals |
| subjects | Aluminum oxide Analytical Chemistry Chemistry Chemistry and Materials Science Convective heat transfer Enclosures Flow distribution Free convection Heat flux Inorganic Chemistry Measurement Science and Instrumentation Nanofluids Nanoparticles Physical Chemistry Polymer Sciences Wall temperature |
| title | Effects of fluctuating heat flux on natural convection of Al2O3 and Cu nanofluids in a square enclosure: a lattice Boltzmann study |
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