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Applying a synthetic turbulence generator to an unmatched RANS-LES interface Научная публикация

Журнал

Journal of Computational and Applied Mathematics
ISSN: 0377-0427

Вых. Данные

Год: 2025, Том: 475, Номер статьи : 116996, Страниц : 24 DOI: 10.1016/j.cam.2025.116996

Ключевые слова

hydrodynamic flows, unmatched grids, General Grid Interface, SIMPLE algorithm, RANS-LES interface, unmatched-grid interface

Авторы

Korotkov A.V. ^1,2 , Kozelkov A.S. ^1,2 , Kurulin V.V. ^1,2 , Shishlenin M.A. ³

Организации

1	Russian Federal Nuclear Center – All-Russian Scientific Research Institute of Experimental Physics (RFNC-VNIIEF)
2	Nizhny Novgorod State Technical University n.a. R.E. Alekseev
3	Sobolev Institute of Mathematics

Информация о финансировании (3)

1	Министерство науки и высшего образования РФ	FSWE-2024-0001
2	Министерство науки и высшего образования РФ	075-15-2022-309
3	Российский научный фонд	24-41-04004

The paper proposes a hybrid zonal RANS-LES model that allows using unmatched-grid fragments in RANS and LES computational domains. During RANS calculations, an SST turbulence model is used to determine the flow parameters. In addition, an original method is applied to connect unmatched-grid fragments. The method accounts for the features of solving the hydrodynamic equations modeling a viscous incompressible fluid flow at the adjacent boundaries of the grid’s unmatched fragments. At the second stage of the calculation, a method to generate velocity fluctuations at the inlet boundaries of a LES domain is applied that creates artificial turbulence and accounts for the unmatched grid between RANS and LES domains. The developed hybrid model was applied to simulate the thermallycompressible viscous fluid flow experimentally investigated in a Vattenfall T-junction. The simulation has demonstrated that in the RANS-LES interfaces enable for the model’s necessary accuracy when calculating averaged flow characteristics.

Korotkov A.V. , Kozelkov A.S. , Kurulin V.V. , Shishlenin M.A.
Applying a synthetic turbulence generator to an unmatched RANS-LES interface
Journal of Computational and Applied Mathematics. 2025. V.475. 116996 :1-24. DOI: 10.1016/j.cam.2025.116996 WOS Scopus OpenAlex

Поступила в редакцию:	23 сент. 2024 г.
Опубликована online:	5 авг. 2025 г.
Опубликована в печати:	14 авг. 2025 г.

Web of science:	WOS:001578836100002
Scopus:	2-s2.0-105013322023
OpenAlex:	W4412983937

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