velocity gradient زینهی ِ تندا zine-ye tondâ
*Fr.: gradient de vitesse*
*Fluid Mechanics*:
The rate at which the velocity changes with the distance across the flow.
When a fluid flows past a stationary wall, the
fluid right close to the wall does not move. However, away from the
wall the flow speed is not zero. Therefore a velocity gradient exists, which is
due to adhesive, cohesive, and frictional forces. The
amount of the velocity gradient is characteristic of the fluid.
→ *velocity*; → *gradient*. |