Recent content by bjarke
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Why Does Hagen-Poiseuille Predict Higher Exit Velocity Than Bernoulli?
That sounds much more reasonable than the 20 bar I got. What did you equation look like? -
Why Does Hagen-Poiseuille Predict Higher Exit Velocity Than Bernoulli?
This is the same problem, but expanded for my entire system. I use the Darcy-Weisbach equation to figure out what my pressure loss is in my tube, and then I iterate this pressure loss into my bernoulli speed to approximate an exit velocity. v=sqrt((2P-static-2P-headloss)/rho) Does this exit... -
Why Does Hagen-Poiseuille Predict Higher Exit Velocity Than Bernoulli?
Yeah, with these speeds the Reynolds number is turbulant for both scenarios, but it is my understanding that both HP and bernoulli assumes laminar flow. But the "pipe" in HP is more an orifice. If I halve the L in HP I would get twice the speed, which doesn't seem right either. Is there some... -
Why Does Hagen-Poiseuille Predict Higher Exit Velocity Than Bernoulli?
I am trying to calculate the exit velocity of a nozzle (0,25Ø) that is connected to a high pressure syringe (10 BAR), however I cannot understand why Hagen-Poiseuille will have a higher exit velocity then Bernoulli when HP take viscosity into account.