result1.gif (3550 ???) Visualization and WKB analysis of the internal gravity wave in the QBO experiment ??-?????? ??-?????

When the amplitude of the wave is sufficiently large, mean flow appears and starts the cyclic reversal. This situation is shown in animation 2.
It can be seen that the direction of the mean flow begins to reverse from the far side, the bottom, and then spreads to the top, near the wave source; and as a result the whole flow completes the reversal. However, because there are not enough  floaters near the membrane, the exact motion could not be determined.

This reversal of the mean flow is shown in Figure 5. The horizontal axis is the time. This is similar to the situation in the real QBO2).

The period of the oscillation is 1 to 2 hours, but there is no apparent correlation with the experimental parameters.

flowlpfs.gif (8999 ???)

Figure 5 The reverse of the mean flow

Animation 2 The oscillation of the mean flow (x230 speed)