Аннотация
The vorticity rotor field B = curlω (divorticity) for freely decaying two-dimensional hydrodynamic turbulence due to a tendency to breaking is concentrated near the lines corresponding to the position of the vorticity quasi-shocks. The maximum value of the divorticity B max at the stage of quasi-shocks formation increases exponentially in time, while the thickness ℓ(t) of the maximum area in the transverse direction to the vector B decreases in time also exponentially. It is numerically shown that B max (t) depends on the thickness according to the power law B max (t) ∼ ℓ −α (t), where α = 2/3. This behavior indicates in favor of folding for the divergence-free vector field of the divorticity.
Язык оригинала | английский |
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Страницы (с-по) | 239-242 |
Число страниц | 4 |
Журнал | JETP Letters |
Том | 109 |
Номер выпуска | 4 |
DOI | |
Состояние | Опубликовано - 1 фев 2019 |