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Thermophysics and Aeromechanics

2019 year, number 1

The dynamics of a cylindrical zone of turbulent mixing in a longitudinal shear flow of a linearly stratified medium

N.P. Moshkin1, A.V. Fomina2, and G.G. Chernykh3,4
1Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia
2Novokuznetsk Institute KemSU, Novokuznetsk, Russia
3Institute of Computational Technologies SB RAS, Novosibirsk, Russia
4Novosibirsk State University, Novosibirsk, Russia
Keywords: stratified fluid, cylindrical zone of turbulent mixing, longitudinal horizontally uniform shear flow, numerical simulation


A numerical model has been constructed and the investigation of the dynamics of a cylindrical localized region of turbulent disturbances in a longitudinal horizontally ho-mogeneous shear flow of a linearly stratified fluid has been carried out. Computation-al results have shown a considerable generation of turbulence energy at the expense of shear flow gradients. It was also found that the shear flow affects weakly the inter-nal waves generated at the evolution of the turbulent mixing zone.