The discussion centers around the relationship between pressure and velocity in fluid dynamics, specifically addressing why pressure decreases as velocity increases. Participants explore theoretical explanations, including references to Bernoulli's principle and Newton's laws of motion.
Participants present multiple competing views regarding the mechanisms behind the pressure-velocity relationship, and the discussion remains unresolved with no consensus reached.
Some claims depend on specific definitions of pressure and velocity, and the discussion does not resolve the underlying assumptions or mathematical steps involved in the explanations provided.
This is an F = ma (Newton's Second Law) kind of thing. If the velocity is increasing, then the fluid is being accelerated. In order to accelerate the fluid, you need to apply a higher pressure (force per unit area) upstream than downstream.Jewish_Vulcan said:Why does pressure decrease as velocity increases, I think it is because pressure is defined as particles hitting the edge of the medium so when velocity increases the particles hit the edge of the medium less but how?
ok thank you, I was thinking that but could not really visualize it, I guess sometimes you just have to trust equations even if they do not make sense...Chestermiller said:This is an F = ma (Newton's Second Law) kind of thing. If the velocity is increasing, then the fluid is being accelerated. In order to accelerate the fluid, you need to apply a higher pressure (force per unit area) upstream than downstream.
Chet