If static pressure goes up, velocity pressure goes?

When static pressure in a system increases, it affects the overall pressure dynamics of that system. In airflow systems, static pressure and velocity pressure are related through the principles of fluid dynamics, specifically within the context of the airflow in ducts.

As static pressure increases, it indicates that there is greater resistance in the system, which can lead to a decrease in velocity pressure. Velocity pressure is a measure of the dynamic pressure of air due to its motion, and when static pressure rises, the energy available to sustain that velocity diminishes. Therefore, as the system's static pressure climbs, the ability of the air to flow at a high velocity decreases, resulting in a lower velocity pressure.

This relationship underscores the fundamentals of air movement in ducts, where a balance between static and velocity pressures is crucial for efficient system performance. A rise in static pressure typically signifies that the airflow is either encountering resistance or that air is being forced into a smaller space, balancing out the overall energy distribution within the system, hence leading to a drop in the velocity pressure.