|Matrix or Vector||Geometry||Shape Functions||Integration Points|
|Conductivity Matrix and Heat Generation Load Vector||Quad||Equation 11–138||3 x 3|
|Specific Heat Matrix||Same as conductivity matrix. If KEYOPT(1) = 1, matrix is diagonalized as described in Lumped Matrices||Same as conductivity matrix|
|Convection Surface Matrix and Load Vector||Same as conductivity matrix, specialized to the face||2|
Heat Flow describes the derivation of the thermal element matrices and load vectors as well as heat flux evaluations. If KEYOPT(1) = 1, the specific heat matrix is diagonalized as described in Lumped Matrices.