Bernoulli's theorem in a Venturi meter uses continuity and the energy equation: pressure difference ΔP = (ρ/2)(v₂² - v₁²), where velocity increases in the constriction. But in my research with blood in medical devices, I can't treat it as a simple, constant-density fluid like water—blood is non-Newtonian and the vessels are compliant. So while the SSC book gives that clean formula, my life modelling flow tells me the real calculation needs corrections for hematocrit and vessel elasticity. It’s like my maths preparation; the textbook problem is one thing, but the actual exam question feels different.
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