Dynamics of a Momentumless Turbulent Wake Behind a Sphere in a Turbulized Stratified Medium

Dynamics of a Momentumless Turbulent Wake Behind a Sphere in a Turbulized Stratified Medium Научная публикация

Журнал

Journal of Engineering Thermophysics
ISSN: 1810-2328

Вых. Данные

Год: 2024, Том: Vol. 33, Номер: No. 4,, Страницы: 852–873 Страниц : DOI: 10.1134/S1810232824040155

Авторы

Chernykh G.G. ¹ , Fomina A.V. ² , Moshkin N.P. ³

Организации

1	Federal Research Center for Information and Computational Technologies, Novosibirsk, Russia
2	Kemerovo State University Kuzbass Humanitarian Pedagogical Institute, Novokuznetsk, Russia
3	Lavrent’ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

Abstract—With application of three-dimensional parabolized system of differential equations including averaged equations of motion in the Oberbeck–Boussinesq approximation and equations for transfer of Reynolds stresses and dissipation rates, a numerical model of the dynamics of a momentumless turbulent wake behind a sphere in a turbulized stratified medium (degenerating external turbulence) was constructed. The components of the mass flow vector and the dispersion of density fluctuations were found from algebraic representations of a locally equilibrium approximation. Numerical simulation of the dynamics of a momentumless turbulent wake behind a sphere and internal waves generated by it in a turbulized linearly stratified medium was performed. The calculation results demonstrate a significant influence of background turbulence on the wake dynamics and internal waves generated by the wake.

Chernykh G.G. , Fomina A.V. , Moshkin N.P.
Dynamics of a Momentumless Turbulent Wake Behind a Sphere in a Turbulized Stratified Medium
Journal of Engineering Thermophysics. 2024. V.Vol. 33. NNo. 4,. P.852–873. DOI: 10.1134/S1810232824040155

Поступила в редакцию:	1 июл. 2024 г.
Опубликована в печати:	24 окт. 2024 г.

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