# Physics

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Newton law of cooling and cooling collision.

• Physics -

I don't know what you mean by "cooling collision".

His "law of cooling" of a surface is an approximation,

q = A*h*(T - Tw), where

A is the area
T is the fluid temperature in the "free stream"
h is the "film coefficient" which depends upon velocity, geometry and temperatures
Tw is the wall temperature

Values of h are usually calculated from dimensional analysis of experimental data.

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