In an experiment, the local heat transfer over a flat plate were correlated in the form of local nusselt number as expressed by the correlation nux=0.035re0.8xpr1/3 determine the ratio of the average convection heat transfer coefficient (h) over the entire plate length to the local convection heat transfer coefficient (hx) (h/hx = l) at x = l.

R= 1.25

Explanation:

As given the local heat transfer,

But we know as well that,

Replacing the values

Reynolds number is define as,

Where V is the velocity of the fluid and \upsilon is the Kinematic viscosity

Then replacing we have

*Note that A is just a 'summary' of all of that constat there.

That is

Therefore at x=L the local convection heat transfer coefficient is

Definen that we need to find the average convection heat transfer coefficient in the entire plate lenght, so

The ratio of the average heat transfer coefficient over the entire plate  to the local convection heat transfer coefficient is

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