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<a accesskey="3" href="page.php?w=boundary_layer&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=physics">physics</a> and <a href="page.php?w=fluid_mechanics">fluid mechanics</a>, a <b>boundary layer</b> is the thin layer of <a href="page.php?w=fluid">fluid</a> in the immediate vicinity of a <a href="page.php?w=Boundary_%28thermodynamic%29">bounding surface</a> formed by the fluid flowing along the surface.  The fluid's interaction with the wall induces a <a href="page.php?w=No-slip_condition">no-slip</a> boundary condition (zero velocity at the wall).  The <a href="page.php?w=flow_velocity">flow velocity</a> then</p><p>
<a accesskey="3" href="page.php?w=boundary_layer&amp;p=2">3.Next</a>
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