Viscosity (Poiseuille flow)
Q = π r⁴ ΔP / (8 η L) for laminar pipe flow.
Calculator
How to use
Poiseuille
Laminar circular pipe.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
Q = π r⁴ ΔP / (8 η L) for laminar pipe flow.
Laminar circular pipe.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
Model / formula
Q = π r⁴ ΔP / (8 η L)
Result
Q = 3.9270e-7 m³/s (laminar pipe)