Question

real fluid have velocity at the walls​

Answer 1

Answer:

what is the q but??????

Answer 2

Answer:

Real fluids have different velocity. In liquids, velocity is due to adhesion forces between the liquid molecules. Velocity is a dissipative effect. When a viscous (sticky) fluid flows past a stationary wall, the fluid next to the wall does not move, but away from the wall the speed is non-zero ⇒ velocity gradient.

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