ASME Letter Document - PDF

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December 22, 2009

New Verification and Validation Standard

A new standard, ASME V&V 20-2009, Standard for Verification and Validation in Computational Fluid
Dynamics and Heat Transfer, was issued on November 30, 2009. This Standard addresses the
verification and validation (V&V) procedures that can be applied to engineering and scientific modeling
problems ranging in complexity from simple lumped masses, to 1-D steady laminar flows, to 3D unsteady
turbulent chemically reacting flows.

The new standard begins with an introduction to the concepts of validation and verification, the definition
of error and uncertainty, and the overall validation methodology.

The text presents a method for code verification based on the technique of a method of manufactured
solutions and the process for solution verification based on the techniques of the grid convergence index,
which is a path for estimating the standard uncertainty associated with numerical errors. Also considered
are different approaches for estimating the standard uncertainty associated with errors in simulation input
parameters. This standard also includes a brief overview of the method presented in the ASME PTC
19.1-2005 – Test Uncertainty for estimating uncertainty in an experimental result.

The document also provides the necessary tools to estimate validation standard uncertainty and the error
associated with the mathematical model, including a discussion of the interpretation of the key validation
metrics of validation comparison error and validation uncertainty.

A final section summarizes the methods presented in the previous sections by applying them to a detailed
example problem that demonstrates the process of working through each element of the procedure.

Another V&V standard, ASME V&V 10-2006 – Guide for Verification and Validation in Computational
Solid Mechanics, provides the computational solid and structural mechanics community with a common
language, a conceptual framework, and general guidance for implementing the processes of
computational model verification and validation.

For more information on purchasing a print or PDF version of ASME V&V 20-2009 or ASME V&V 10-2006
click here.