A Method of Code Comparison for CFD Verification

The main objective of a code verification process is to assess using known solutions if the algorithm implemented in the code is adequately representing the conceptual model. Verification of Codes requires either exact or highly accurate results that can be obtained using a reference code. This paper presents a new method of code comparison. The reference code is first verified via comparison with exact solutions using the Method of Manufactured Solutions (MMS). Another convergence study is then performed with the reference code, without the MMS source terms, to provide a reference solution. Finally, the same test is run using the code to be verified. The convergence properties of the benchmarked code can then be assessed, and results of both codes can be compared by taking into account all numerical uncertainties.