After the matrix Equation 9–9 is solved for the nodal concentration vector , the diffusion gradient {g}, and the diffusion flux {J} are evaluated at the integration points as follows:

(9–10)

(9–11)

Nodal values of concentration gradient {g} (output as CG) and diffusion flux {J} (output as DF) are computed from the integration point values, as described in Nodal and Centroidal Data Evaluation. With the normalized concentration approach, the element true concentration is calculated at the element centroid and output as SMISC,1.