Now, what happens to velocity? We know when there is a change of pressure, there has to be a change in velocity. Now, since there is a increase in pressure here, there would be a decrease in velocity initially, and then, due to this increase, this increase in pressure, there will be a decrease, but you see this, pressure is dropping here; that means velocity is increasing. There is something that happens here and then again pressure is dropping. So, velocity will increase again. Is that clear? Also we know that fluid will observe the continuity principle, that is, fluid cannot be created or destroyed and the flow will be continuous.