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Parallel flow of atmospheric air over a flat plate of length L 3 m is disrupted by an array of stationary rods placed in the flow path over the plate.

Parallel flow of atmospheric air over a flat plate of length L 3 m is disrupted by an array of...

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Laboratory measurements of the local convection coefficient at the surface of the plate are made for a prescribed value of u and Ts T. The results are correlated by an expression of the form hx  0.7 13.6x 3.4x 2 , where hx has units of and x is in meters. Evaluate the average convection coefficient for the entire plate and the ratio at the trailing edge.

For laminar flow over a flat plate, the local heat transfer coefficient hx is known to vary as x12 , 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?

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