...
You may now close the Mesh Display window. In the menu bar, go to Adapt > Gradient. Under Options uncheck Coarsen. Ensure that Gradients of > Pressure... Static Pressure are selected. Then press Compute.
This will compute the maximum and minimum gradients of static pressure. Next, we need to pick a threshold. For every element that has a pressure above that threshold, that element will be refined. Let's make our threshold 10000. Enter 10000
into Refine Threshold. Then press Adapt. You will be asked if you want to change the mesh. Press Yes.
...