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Volume 14, Issue 6
Interaction of Radiation and Turbulent Natural Convection: A Pseudo-Direct Numerical Study

Alexander Nee & Ali J. Chamkha

Adv. Appl. Math. Mech., 14 (2022), pp. 1567-1586.

Published online: 2022-08

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  • Abstract

This paper presents a hybrid lattice Boltzmann solver for turbulent buoyancy-driven flow coupled with surface thermal radiation. The two-relaxation time scheme for the Boltzmann equation combined with the implicit finite difference scheme for the energy equation is implemented to compute the heat transfer and fluid flow characteristics. The accuracy and robustness of the hybrid approach proposed in this study are assessed in terms of the numerical and experimental data of other researchers. Upon performing the simulation, the Rayleigh number is ranged from 108 to 1010 whereas the surface emissivity is changed from zero to unity. During computations, it is found that the overall temperature of the cavity is increased as a result of enhancing the surface radiation. Convective plumes are formed both at the isothermal and the thermally-insulated walls with the $Ra≥10^9$ and $ε≥0.6.$ In the conditions under study, the overall heat transfer rate is raised by around 5% when taking into account the surface thermal radiation.

  • Keywords

Pseudo-direct numerical simulation, surface radiation, hybrid lattice Boltzmann scheme, turbulent natural convection.

  • AMS Subject Headings

80A20, 76F65

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{AAMM-14-1567, author = {Alexander and Nee and and 24259 and and Alexander Nee and Ali J. and Chamkha and and 24260 and and Ali J. Chamkha}, title = {Interaction of Radiation and Turbulent Natural Convection: A Pseudo-Direct Numerical Study}, journal = {Advances in Applied Mathematics and Mechanics}, year = {2022}, volume = {14}, number = {6}, pages = {1567--1586}, abstract = {

This paper presents a hybrid lattice Boltzmann solver for turbulent buoyancy-driven flow coupled with surface thermal radiation. The two-relaxation time scheme for the Boltzmann equation combined with the implicit finite difference scheme for the energy equation is implemented to compute the heat transfer and fluid flow characteristics. The accuracy and robustness of the hybrid approach proposed in this study are assessed in terms of the numerical and experimental data of other researchers. Upon performing the simulation, the Rayleigh number is ranged from 108 to 1010 whereas the surface emissivity is changed from zero to unity. During computations, it is found that the overall temperature of the cavity is increased as a result of enhancing the surface radiation. Convective plumes are formed both at the isothermal and the thermally-insulated walls with the $Ra≥10^9$ and $ε≥0.6.$ In the conditions under study, the overall heat transfer rate is raised by around 5% when taking into account the surface thermal radiation.

}, issn = {2075-1354}, doi = {https://doi.org/10.4208/aamm.OA-2021-0220}, url = {http://global-sci.org/intro/article_detail/aamm/20859.html} }
TY - JOUR T1 - Interaction of Radiation and Turbulent Natural Convection: A Pseudo-Direct Numerical Study AU - Nee , Alexander AU - Chamkha , Ali J. JO - Advances in Applied Mathematics and Mechanics VL - 6 SP - 1567 EP - 1586 PY - 2022 DA - 2022/08 SN - 14 DO - http://doi.org/10.4208/aamm.OA-2021-0220 UR - https://global-sci.org/intro/article_detail/aamm/20859.html KW - Pseudo-direct numerical simulation, surface radiation, hybrid lattice Boltzmann scheme, turbulent natural convection. AB -

This paper presents a hybrid lattice Boltzmann solver for turbulent buoyancy-driven flow coupled with surface thermal radiation. The two-relaxation time scheme for the Boltzmann equation combined with the implicit finite difference scheme for the energy equation is implemented to compute the heat transfer and fluid flow characteristics. The accuracy and robustness of the hybrid approach proposed in this study are assessed in terms of the numerical and experimental data of other researchers. Upon performing the simulation, the Rayleigh number is ranged from 108 to 1010 whereas the surface emissivity is changed from zero to unity. During computations, it is found that the overall temperature of the cavity is increased as a result of enhancing the surface radiation. Convective plumes are formed both at the isothermal and the thermally-insulated walls with the $Ra≥10^9$ and $ε≥0.6.$ In the conditions under study, the overall heat transfer rate is raised by around 5% when taking into account the surface thermal radiation.

Alexander Nee & Ali J. Chamkha. (2022). Interaction of Radiation and Turbulent Natural Convection: A Pseudo-Direct Numerical Study. Advances in Applied Mathematics and Mechanics. 14 (6). 1567-1586. doi:10.4208/aamm.OA-2021-0220
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