Uploaded on Mar 29, 2007
As a fluid flows near a solid surface, it
"sticks" to the surface, i.e., the fluid matches
the velocity of the surface. This so-called
"no-slip" condition is a very important one
that must be satisfied in any accurate analysis
of fluid flow phenomena.
Dye injected at the bottom of a channel
through which water is flowing forms a
stagnant layer near the bottom due to the noslip
condition. As the dye filament is moved
away from the bottom, the motion of the
water is clearly apparent. A significant
velocity gradient is created near the bottom.
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