Why do passing trucks suck instead of blow?
Nope, it's not the first line of a joke or a rhetorical question. I would expect a passing truck or bus to be pushing a wave of high pressure air in front and beside, but I've noticed time and agai...
Forum Discussion
Vulcan Rider wrote:
Since when does MORE air forced into a SMALLER space equal a LOWER pressure ??
HINT: It doesn't.
When the MORE air travels faster it will be at a lower pressure. The increased pressure at the front "forces" the air to travel faster around the sides. Just like putting your finger on the end of a hose. The increase in speed of the air is traded for a lower static pressure exerted on the surroundings.
Wikipedia wrote:
Bernoulli's principle can be derived from the principle of conservation of energy. This states that, in a steady flow, the sum of all forms of energy in a fluid along a streamline is the same at all points on that streamline. This requires that the sum of kinetic energy, potential energy and internal energy remains constant.[2] Thus an increase in the speed of the fluid – implying an increase in both its dynamic pressure and kinetic energy – occurs with a simultaneous decrease in (the sum of) its static pressure, potential energy and internal energy
https://en.wikipedia.org/wiki/Bernoulli%27s_principle
