Accuracy issues in modeling thermal NDT problems

Two models which can be regarded as extreme simulation cases in thermal nondestructive testing are studied numerically with accent being made on the accuracy issue. Four computer programs (ThermoCalc-2D, ThermoCalc-6L, ThermoModel and Comsol Multiphysics) are compared in calculating both absolute temperatures and thermal NDT parameters, such as differential temperature signal and running contrast.