Fluids and gases

Poiseuille's law

Q = πr4ΔP/(8ηL)

Q flow rate, r radius, ΔP pressure difference, η viscosity, L length

Watch forFlow scales with r⁴: halving the radius cuts flow to 1/16.

Apply it · 2 questions

  1. Compensating for a narrowed vesselFluids and gases · set 3 · hard
  2. Poiseuille's law: halving vessel radiusFluids and gases · set 2 · medium