Poiseuille Flow Calculator
Compute laminar volumetric flow Q = πr⁴ΔP/(8ηL).
Input Data
Input Radius r.
m
Input Pressure drop ΔP.
Pa
Input Viscosity η.
Pa·s
Input Length L.
m
Results
0.003927m³/s
Q = πr⁴ΔP/(8ηL).
At a glance:Poiseuille Flow Calculator: enter parameters to compute results; complements related calculators.
Formula
Q = π·r⁴·ΔP / (8·η·L).
How to Use
- Enter radius, pressure drop, viscosity and length.
- It returns volumetric flow.
Case Studies
r=0.01, ΔP=1000, η=0.001, L=1 → Q≈3.93×10⁻³ m³/s
Q = π·1e-8·1000/0.008 ≈ 3.93e-3.
FAQ
How sensitive to radius?
Q ∝ r⁴, so doubling radius gives 16× flow.
Related Tools
References
Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.