Abstract: 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.

Cite: 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

Dates:

Submitted:	Jul 1, 2024
Published print:	Oct 24, 2024

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