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[–]Zukuto 0 points1 point  (0 children)


remember your hydraulics: pumps do not create pressure, they create flow. pressure is the result of resistance to flow. the constriction of area and the smoothness of the pipes, as well as the valving. these create pressure. the flow in a small section of pipe (call it 1 inch) and the flow in a transitional section of pipe (call it two inch) must be equal. remember flow is a measure of volume moving through an area over time. in order to understand why the pressure in the 2inch pipe is HIGHER than the 1 inch pipe, understand that even though the FLOW is the same, the VELOCITY is not. because the velocity is slower, the fluid expands. thus the pressure increases but the flow stays the same. lets say a 1 inch pipe needs to push 2 gallons through a 2 foot length, well in a 2 inch pipe the pressure will be higher in order to move that same volume of fluid because the area has changed. the fluid doesnt move as fast, but the same amount of fluid moves, and does so in the same time.

you arent trying to understand diffusion, you are trying to understand Bernoulli's principle. diffusion is a misnomer. but you already stated you understand to lets try and think of in terms of prison....

imagine taking a dump. when you get to prison your anus expands, making your shits seem to require less pressure to poop. a month after release from prison your anus contracts and it takes more pressure to poop.

this whole excersize only works when your fluid is non-turbulent anyway, and is depended on the compressibility of the fluid as much as the actual pressures involved. in not so many words, this works on slow moving fluid that has a very small compressibility factor (almost anything that is not a gas).

it also works with Light. when light passes through a substance like diamond, it slows down. it is not less intense light, it is just slower. as it exits the diamond it speeds up as the medium has changed and does not hinder the light in the same distinct ways the diamond does.