Internal waves generated by turbulent wakes in a stably stratified medium

Dynamics of turbulent wake with small excess momentum in stratified media

“…This indicates the weak influence of small excess momentum on the pattern of internal waves generated by turbulent wakes in stratified fluid. There is significant distinction between the evolution of axisymmetric turbulent wakes past towed [21][22][23] and past self-propelled bodies (or bodies with small excess momentum). In the wakes behind towed bodies in homogeneous fluid the production of turbulent energy due to the average flow has significant effect.…”

“…Based on the model including modified algebraic representations of triple correlations of the velocity field and the transfer equation for the dissipation rate, a numerical investigation of a far momentumless wake in a linearly stratified fluid was carried out in [19]. The internal waves generated by the turbulent wakes of self-propelled and towed bodies moving in a stable stratified fluid were studied numerically in [5,16,[21][22][23][24]. The turbulent wake behind a towed body was shown to generate internal waves of substantially larger amplitude than those behind a self-propelled body.…”

On the performance of high resolution non-oscillating advection schemes in the context of the flow generated by a mixed region in a stratified fluid

“…The interest in this problem stems from the study of a number of geophysical phenomena and a number of technical problems [7,16,18,19,26,21]. For example, because the turbulent wake behind a body traveling through stratified fluid is very slender in the direction of body motion, the flow field and internal waves induced by the wake can be adequately described by studying the collapse of a non-turbulent mixed region in stratified medium [9,16,20,29,30]. There are numerous studies focusing on locally homogeneous perturbations of the density field (fully mixed region).…”

A comparative study of the performance of high-resolution non-oscillating advection schemes in the context of the motion induced by mixed region in a stratified fluid

“…The interest in this problem stems from the study of a number of geophysical phenomena and a number of technical problems [1][2][3][4][5][6]. For example, because the turbulent wake behind a body traveling through stratified fluid is very slender in the direction of body motion, the wake-induced flow field and internal waves can be adequately described by studying the collapse of the nonturbulent mixed region in a stratified medium [5,[7][8][9][10]. There are numerous studies focusing on locally homogeneous perturbation of the density field (fully mixed region).…”