
How does measurement of static and dymanic pressure work exactly?
I was thinking about the measurement of static and dynamic pressure and realised I don't really understand it.
The velocity of the fluid inside the U shaped tubes is 0, so naively applying bernoullis principle, the pressure also should be the same in all of them. Obviously in the case of G we cannot apply Bernoulli principle the fluid is not on the same streamline as in the main tube? But what exactly breaks the streamline?
What woud the pressure be in these different scenarios?
B: does the angle of the tube affect the measurement? How?
C: what if the angle is 90° is the dynamic pressure completely negated?
F: if a 90°change in direction stops the transmission of pressure do further bends in the tube affect it? Why or why not?