Physics
posted by Peter .
Newton law of cooling and cooling collision.

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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