Question

Difference between stagnation pressure and static pressure

Answer 1

Stagnation Pressure is the pressure which is achieved when a flowing fluid is reduced to zero velocity in a frictionless process or say it’s the pressure at the stagnation point in a fluid flow. The pressure inside the pitot tube increases on the cost of kinetic head loss.

[math]P[/math][math]stag[/math][math] = Pstat + Pdynamic[/math]

Generally the concept of stagnation pressure comes into picture when we are dealing with pitot-tube. Pitot tube is a device which is used to measure the flow velocity either in pipes or in open channels. While static pressure is the pressure exerted on the body when it remains at rest.

Hope this helps!

Answer 2

In fluid dynamics, stagnation pressure (or pitot pressure) is the static pressure at a stagnation point in a fluid flow. At a stagnation point the fluid velocity is zero. In an incompressible flow, stagnation pressure is equal to the sum of the free-stream static pressure and the free-stream dynamic pressure.