Assessment of high order regularized hybrid lattice Boltzmann scheme for turbulent thermal convection

Assessment of high order regularized hybrid lattice Boltzmann scheme for turbulent thermal convection

Bibliografski detalji
Parent link:International Communications in Heat and Mass Transfer
Vol. 143.— 2023.— [106723, 13 p.]
Glavni autor: Nee A. E. Aleksandr Eduardovich
Autor kompanije: Национальный исследовательский Томский политехнический университет Инженерная школа энергетики Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова)
Sažetak:Title screen
In this paper, fluid behavior and the second order statistics of developed turbulent natural convection is numerically predicted by the hybrid lattice Boltzmann method. In order to simulate the high Rayleigh number flow, the high order regularized lattice Boltzmann scheme combined with the finite difference solution of energy equation is used. An in-house code was carefully validated against the reference data computed by different numerical macroscopic and mesoscopic techniques. Simulations were performed for cavity aspect ratio 1 ≤ Ar ≤ 4 and Rayleigh number 1010 ≤ Ra ≤ 1011. It was found that two-dimensional (2D) models overpredicted turbulent statistics in comparison with three-dimensional (3D) models. Moreover, less stratified thermal fields are observed under 2D simulations. However, the mean Nusselt numbers are well agreed both for 2D and 3D models. The proposed hybrid model with uniform grid spacing reproduced integral heat transfer characteristics with acceptable accuracy for engineering applications. In particular, the relative error in the mean Nusselt number is within 5% when comparing the results with conventional fully resolved Navier-Stokes formulation.
Режим доступа: по договору с организацией-держателем ресурса
Izdano: 2023
Teme:
электронный ресурс
труды учёных ТПУ
turbulent natural convection
hybrid lattice Boltzmann method
high order regularization
турбулентная естественная конвекция
метод Больцмана
регуляризация
Online pristup:https://doi.org/10.1016/j.icheatmasstransfer.2023.106723
Format: Elektronički Poglavlje knjige
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669333

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