For laminar flow over a flat plate, the local heat transfer coefficient hx is known to vary as x−1/2, where x is the distance from the leading edge (x = 0) of the plate. what is the ratio of the average coefficient between the leading edge and some location x on the plate to the local coefficient at x?

2

Explanation:

So for solving this problem we need the local heat transfer coefficient at distance x,

We integrate between 0 to x for obtain the value of the coefficient, so

Substituing

The ratio of the average convection heat transfer coefficient over the entire length is 2

answer:

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