Poiseuille parabolic profile · Pulsatile flow · Stenosis · Wall shear stress
Interactive hemodynamics simulator showing Poiseuille's parabolic velocity profile, pulsatile flow from the heart, stenosis effects on flow velocity, and wall shear stress in blood vessels.
Laminar blood flow follows Poiseuille's law: Q = πr⁴ΔP / (8μL). Narrowing a vessel (stenosis) forces blood faster through a smaller cross-section, increasing shear stress on the vessel wall and risk of plaque rupture.
Adjust vessel radius and blood pressure to see the velocity profile change. Add stenosis to observe flow acceleration and turbulence. Watch wall shear stress (WSS) values update in real time.
Blood flow velocity at the vessel centre is about twice the average velocity. In a 50% stenosis, the velocity can increase 4× and wall shear stress 8× due to Poiseuille's fourth-power dependence on radius.