Evaluation of hybrid lattice Boltzmann models for laminar and turbulent natural convection

Evaluation of hybrid lattice Boltzmann models for laminar and turbulent natural convection

Dades bibliogràfiques
Parent link:International Communications in Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 162.— 2025.— Article number 108635, 16 p.
Autor principal: Nee A. E. Aleksandr Eduardovich
Sumari:Title screen
The paper analyzes different hybrid lattice Boltzmann models in buoyancy driven flow problems. The single relaxation time (BGK), two relaxation time (TRT) and high order regularized (RLB) collision models coupled with the first (1), second (2) and fourth (4) order approximation of energy equation were studied when modelling natural convection in a closed rectangular cavity. Laminar, laminar-to-turbulent and developed turbulent flows with the Rayleigh number (Ra) up to 1012 were considered. The local, mean and turbulent characteristics were validated against benchmark direct numerical simulation data of other researchers. It was found that all hybrid modes under consideration predicted the same results with Ra≤108. The TRT-2 scheme had a satisfactory performance within the laminar-to-turbulent flow behavior in a range of 6.4⋅108≤Ra≤1010. On the other hand, the RLB-4 model demonstrated an outstanding numerical stability within developed thermal turbulence region. In particular, this scheme was stable even with Ra=1012
Текстовый файл
AM_Agreement
Publicat: 2025
Matèries:
электронный ресурс
труды учёных ТПУ
turbulent natural convection
laminar convection
hybrid lattice Boltzmann models
Accés en línia:https://doi.org/10.1016/j.icheatmasstransfer.2025.108635
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=678330

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