Table 3.
Input parameters and output diagnostics of the simulations where a passive scalar is introduced.
| Name | 𝒩 | Pr | Run | t0 | τM/τΩ |
 |
|---|---|---|---|---|---|---|
| C0 | 0 | – | U0 | 1764.1 | 117.5 | 18.9 ± 6.8 |
| C1 | 1 | 10−3 | S0 | 2151.3 | 139.8 | 16.6 ± 0.7 |
| C2 | 1 | 10−2 | S1 | 1811.2 | 187.2 | 12.0 ± 1.4 |
| C3 | 1 | 10−1 | S2 | 2092.9 | 277.4 | 8.3 ± 0.8 |
| C4 | 10 | 10−4 | S3 | 1400.2 | 353.9 | 10.6 ± 1.5 |
| C5 | 10 | 10−3 | S4 | 2625.1 | 246.3 | 5.4 ± 0.6 |
| C6 | 10 | 2 × 10−3 | S5 | 2466.5 | 435.3 | 3.9 ± 0.4 |
| C7 | 20 | 10−4 | S7 | 1755.6 | 249.9 | 7.8 ± 1.1 |
| C8 | 20 | 5 × 10−4 | S8 | 1902.6 | 543.1 | 3.3 ± 0.2 |
| C9 | 20 | 10−3 | S9 | 2282.4 | 648.3 | 2.7 ± 0.2 |
Notes. t0 is the time of the simulation runs indicated in the fourth column at which the passive scalar is introduced. τM is the meridional flow timescale calculated as explained in the main text. 
is the estimated turbulent chemical diffusivity and the error denotes 1 standard deviation in time. All runs are at Re = 5 × 104 and Pm = 1.
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