= Euler limit
{c}
= Inviscid limit
{synonym}
The Euler limit sends the <kinematic viscosity> to zero while observing the flow at a fixed positive distance from a wall. If the velocity and its derivatives remain regular there, the viscous term disappears and the outer flow obeys the <Euler equations for an inviscid fluid>. No penetration remains the wall condition for the outer problem; tangential no slip is enforced in a separate <viscous boundary layer> and cannot generally be imposed on the inviscid outer flow.
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