7.3 Fluid fills the space between two parallel plates. The differential equation that describes the instantaneous luid velocity for unsteady flow with the fluid moving parallel to the walls is = l- The lower plate is stationary and the upper plate oscillates in the x-direction with a frequency w and an amplitude in the plate velocity of U. Use the characteristic dimensions to normalize the differential equation and obtain the dimensionless groups that characterize the flow. U cos ot |H P7.3

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