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
wnjj wrote:
The increase in speed of the air is traded for a lower static pressure exerted on the surroundings.
ONLY when the volume of the air remains the same.
If you increase the amount of air in a (somewhat) confined space, the pressure goes up, not down.
The wake from each vehicle is already compressed somewhat; add the two together and the pressure is even higher.
