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Two flat, rectangular plates with a lateral dimension

Two flat, rectangular plates with a lateral dimension w*l lie parallel, one above the other, a distance h apart. The gap between them is filled with molten polymer. One plate is fixed; the other moves parallel to it in the direction of the dimension l at velocity v, causing the fluid to be sheared. Show that the fluid is displaced past the stationary plate with a volume flow rate Q given by:
Q =vhw/2

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Flow rate will be
Q = v*A
We know that our ...

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