So my understanding is that pressure and velocity are inversely proportional. If I where to go from an 8" pipe to a 4" pipe the velocity would increase thus a decrease in pressure. Pretty straight forward. My questions then, is at a reducer, nozzle, et cetera...would you have a space at the point of most reduction where you had high pressure and high velocity? Imagining the fluid fluid flowing in a straight 8" line into a concentric reducer to 4" I would imagine (again...please excuse my awful and non scientific explanation...lol) that the "center most" 4" of flow would accelerate and reduce pressure but the fluids around it would slow or even help prevent the fluid around it from moving as efficiently and increasing the pressure around the imaginary 4" fluid line. I guess I'm thinking of it like a 4 lane highway being reduced to 2. There is a taper but eventually the far left lane should have steady flow but the right lane becomes congested and clogged as cars try to force themselves all the way to the end and inevitably lock up traffic. Does this put added strain on reducers and nozzles from a material stand point? all of this is idle curiosity lol...please understand I'm not a physicist...just an aspiring engineer whos terrible at math and wants to learn more!

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    $\begingroup$ I don't enjoy breaking it to you but your explanation suck from a physics perspective, you should know that. As much as I could grab, you're in a state of confliction where Bernoulli's law says pressure drops with constriction and your Intuition is telling you it should be coz the jam due to constriction should be tearing the wall of the passage apart. Is that right?? $\endgroup$ – TechDroid Apr 19 at 20:45

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