Fluid Flow · Interactive
The Fourth-Power Faucet
Widen a tube a little and the flow doesn’t creep up — it leaps. Drag the width below and watch reality pull away from what your intuition drew.
The Widening
One tube, adjustable width. Everything else — length, push, fluid — held fixed.
2.00×Tube width
16.00×Flow through it
Smooth or Rough?
The clean law lives in the world of laminar flow. Push hard enough and it dissolves into turbulence.
Laminar
Reynolds number: 0
The fourth-power law assumes smooth, steady, laminar flow of a simple (Newtonian) fluid through a straight, rigid tube. Honey stays laminar at any speed you can set here; thin water tips into turbulence once it’s pushed fast — watch the badge flip.
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