Validation of Simulations

This chapter presents the verification and validation (V&V) methodology from ASME V&V20—2009: Standard for Verification and Validation in Computational Fluid Dynamics and Heat Transfer. These V&V procedures can be applied in all areas of computational engineering and science. The V&V20 approach quantifies the degree of accuracy inferred from the comparison of solution and data for a specified variable at a specified validation point. The nomenclature used in the validation approach is shown in the chapter using the pipe flow example with pressure drop (ΔP) as the validation variable and for a given validation condition. The validation comparison error (E) is the combination of all of the errors in the simulation result and the experimental result, and its sign and magnitude are known once the validation comparison is made. All errors in the simulation solution (S) can be assigned to one of three categories: δ model ; δ num ; and δ input .