Correct solution needed here.This is Computational Fluid Dynamics Problem.

Two surfaces of a large plate with a thickness of L=2cm are kept at temperatures of TA and TB. Thermal conductivity k=0.5W/m.K, uniform heat generation q=2000kW/m3, and cross sectional area A=202m2 are the relevant values. Consider three grid points for calculating the temperature inside the slab. Compare the numerical results with analytical solution of temperature given by T=TBTA+q(Lx)x+TA