What Factors Influence the Development of Static Pressure in Fluids?

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Static pressure is defined as the pressure of a fluid at rest, while dynamic pressure relates to the fluid's velocity and is often a source of confusion in discussions about fluid mechanics. The distinction between static and dynamic pressure is important for understanding Bernoulli's principle, as it helps clarify how pressure behaves in moving fluids. Some argue that referring to different types of pressure complicates learning, while others believe it is necessary for accurate measurements and calculations. Total pressure, which includes both static and dynamic components, is considered a conserved quantity in fluid dynamics. Understanding these terms and their relationships is essential for correctly interpreting fluid behavior in various applications.
  • #31
boneh3ad said:
Right, so he was asking what he would call the two terms on the right hand side that add up to stagnation pressure. You only quoted the one term, and the term you quoted was the dynamic pressure term.
Missed an edit, my previous post is correct now. The point was that dynamic, impact, or stagnation pressure can refer to either compressible or incompressible flow.
 
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  • #32
rcgldr said:
My point was that stagnation pressure can refer to either compressible or incompressible flow.

Well, yes, and it is defined the same way in each case: the static pressure when the flow is isentropically brought to zero velocity. You just have to be careful how you measure it, as doing so with a Pitot probe introduces a shock into the flow, which is not isentropic, and you must incorporate the shock into the calculation. It is still fairly easy to do, though.
 

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