Click here to get an animation of velocity vectors in the SX pump-box. Careful! It is 18.5 MB large and will take some time to download. You can also right-click and choose Save Target As... and store the clip on your hard drive and watch it at a later time.
You will get horizontal slices of the velocity vectors. You can see where there is action and where there are dead zones. The pictures below are just previews of the video clip you can download.
About 1/2 way up. Notice the
strong upward velocities in front of the baffles.
A bit above the pumper.
In the impeller zone.
There is a strong circular motion. Look at the
shadows behind the baffles.
Under the false bottom. Notice the
flow coming in the inlet pipes and the flow hitting
the divider.
Near the bottom of the tank, below
the inlet pipes.