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FIG. 3.

Fourier amplitudes û (black) and v̂ (blue) of the velocity components u and v, respectively, as functions of the dimensionless frequency f at the point (x,y)=(1/4,1/4) obtained from t∈[20,120] for Re=500 and Str=0.1.

Fourier amplitudes $\hat{u}$ (black) and $\hat{v}$ (blue) of the velocity components u and v, respectively, as functions of the dimensionless frequency f at the point $(x, y) = (1 / 4, 1 / 4)$ obtained from $t \in [20, 120]$ for $Re = 500$ and $Str = 0.1$ ⁠.

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