Cognitive Scaffold

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MENTAL MODEL · M4456

Coanda Effect

Coanda Effect
TechnicalHigh supportFluid Mechanics
Included
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

A fluid (air or water flow) tends to flow along a curved surface rather than shooting out in a straight line. Simply adding a curved surface at the nozzle causes the fluid to turn naturally.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

A metaphor for the power of guiding with the flow. To change a person's behavior (flow direction), rather than forcibly blocking or lecturing (creating turbulence), provide a "curved surface" (a path that aligns with their habits or interests) so they unconsciously turn in the direction you want.

anchor

Anchor fast decisions

The tendency of a fluid (especially airflow) to attach and flow along a convex curved surface, causing the jet to be "sucked" and deflected by the surface.

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Coand%C4%83_effectZH · Explicit
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