Sum is from i = 1 to n. Each linear equation has three coefficients
ao, a1, and a2. These unknowns can be solved by
using the experimental data. Here the correlating equation
is T(K) = t (C) + 273, x((1/T) · 103) and y(Deff) were used.
Polynomial is second order and n is 3. Results for both natural
and forced-convection are given below.