The variables and parameters used in this example are as follows: p = density, c p =

Question:

The variables and parameters used in this example are as follows: p = density, c_p = heat capacity, q = heat flux, k = thermal conductivity, A = cross-sectional area, S = source strength (J m⁻³ s⁻¹). $accumulation: in (conduction): out (conduction): production: PC, (x); (q 4)\, t; (q4)\x+. ; SAx t.$

Insertion of these terms into the balance equation yields pc p = q|x - glx+Ax By taking the limit as Ax - 0 and At - 0 we have aT ag 3x at Finally, introducing