Question: Water is contained between two infinite parallel plates separated by a small distance h. The bottom plate is stationary and the top is moved at

Water is contained between two infinite parallel plates separated by a small distance h. The bottom plate is stationary and the top is moved at a constant velocity U so that a simple, parallel shear flow is generated. A dilute plug of solute with a diffusivity D is placed in the channel. Neglecting the effects of diffusion in the x-direction, find the effective dispersion coefficient for this problem.

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