The objective is to clarify meanings and indicate how some of the terms have specific definitions that may be different than common usage of those terms. Other definitions and discussions come from other literature cited in the bibliography . The terms are listed alphabetically. Calibration in the context of CFD simulations is defined as The process of adjusting numerical or physical modeling parameters in the computational model for the purpose of improving agreement with experimental data. Calibration has more to do with improving agreement of computational results with experimental results rather than assessing error and uncertainty.
Calibration arises from uncertainty in modeling complex physical processes.
It adjusts unmeasured or poorly characterized experimental parameters. One use of calibration may be the adjustment of emperical constants found within a turbulence model. While calibration improves agreement for a class of problems, it may make the code less general. Certification of a code encompases verification and validation, but also includes such things as documentation, quality assurance, and version control. Certification is concerned with managerial and programmatic concerns on the use of the CFD code for design activities.