Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature
In this study, the cyclic natural convection problem in a square enclosure is modeled using the Lattice Boltzmann Method (LBM) under laminar flow conditions. Four different combinations of boundary conditions are employed to create cases. These cases are denoted as HHHC (Horizontal Hot Horizontal Co...
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Sakarya University
2025-04-01
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| Series: | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
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| Online Access: | https://dergipark.org.tr/en/download/article-file/4501998 |
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| author | Özlem Yalçın Erman Aslan |
| author_facet | Özlem Yalçın Erman Aslan |
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| description | In this study, the cyclic natural convection problem in a square enclosure is modeled using the Lattice Boltzmann Method (LBM) under laminar flow conditions. Four different combinations of boundary conditions are employed to create cases. These cases are denoted as HHHC (Horizontal Hot Horizontal Cold), HHVC (Horizontal Hot Vertical Cold), VHHC (Vertical Hot Horizontal Cold), and VHVC (Vertical Hot Vertical Cold). Four Rayleigh numbers have been utilized to represent laminar flow conditions, namely Ra=104, 105, 106, and 107. For validation purposes, the well-validated finite volume method-based commercial code Ansys-Fluent is employed. In the VHVC model and at the highest Rayleigh number, the results obtained with LBM were compared to and validated against the results obtained with the finite volume method. Nusselt numbers are compared for the four cases based on Rayleigh numbers, and the case with highest heat transfer identified. Cases of HHHC and VHVC have produced the lowest and highest Nusselt number, respectively. |
| format | Article |
| id | doaj-art-d210d12e847341ce89f61271c19498d7 |
| institution | Kabale University |
| issn | 2147-835X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Sakarya University |
| record_format | Article |
| series | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| spelling | doaj-art-d210d12e847341ce89f61271c19498d72025-08-20T03:52:33ZengSakarya UniversitySakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi2147-835X2025-04-0129215115910.16984/saufenbilder.161545728Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall TemperatureÖzlem Yalçın0https://orcid.org/0000-0001-9354-1671Erman Aslan1https://orcid.org/0000-0001-8595-6092ISTANBUL GELISIM UNIVERSITYKOCAELI UNIVERSITYIn this study, the cyclic natural convection problem in a square enclosure is modeled using the Lattice Boltzmann Method (LBM) under laminar flow conditions. Four different combinations of boundary conditions are employed to create cases. These cases are denoted as HHHC (Horizontal Hot Horizontal Cold), HHVC (Horizontal Hot Vertical Cold), VHHC (Vertical Hot Horizontal Cold), and VHVC (Vertical Hot Vertical Cold). Four Rayleigh numbers have been utilized to represent laminar flow conditions, namely Ra=104, 105, 106, and 107. For validation purposes, the well-validated finite volume method-based commercial code Ansys-Fluent is employed. In the VHVC model and at the highest Rayleigh number, the results obtained with LBM were compared to and validated against the results obtained with the finite volume method. Nusselt numbers are compared for the four cases based on Rayleigh numbers, and the case with highest heat transfer identified. Cases of HHHC and VHVC have produced the lowest and highest Nusselt number, respectively.https://dergipark.org.tr/en/download/article-file/4501998lattice boltzmann methodnatural convectioncomputational fluid dynamicslaminar flownusselt numberdoğal taşınımhesaplamalı akışkanlar dinamiğilaminer akışnusselt sayısılattice boltzmann metodu |
| spellingShingle | Özlem Yalçın Erman Aslan Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi lattice boltzmann method natural convection computational fluid dynamics laminar flow nusselt number doğal taşınım hesaplamalı akışkanlar dinamiği laminer akış nusselt sayısı lattice boltzmann metodu |
| title | Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature |
| title_full | Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature |
| title_fullStr | Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature |
| title_full_unstemmed | Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature |
| title_short | Lattice Boltzmann Modelling of Natural Convection Problems in a Cavity with a Different Wall Temperature |
| title_sort | lattice boltzmann modelling of natural convection problems in a cavity with a different wall temperature |
| topic | lattice boltzmann method natural convection computational fluid dynamics laminar flow nusselt number doğal taşınım hesaplamalı akışkanlar dinamiği laminer akış nusselt sayısı lattice boltzmann metodu |
| url | https://dergipark.org.tr/en/download/article-file/4501998 |
| work_keys_str_mv | AT ozlemyalcın latticeboltzmannmodellingofnaturalconvectionproblemsinacavitywithadifferentwalltemperature AT ermanaslan latticeboltzmannmodellingofnaturalconvectionproblemsinacavitywithadifferentwalltemperature |