ASME V&V 20-2009 (2021) PDF

Full title and description

ASME V&V 20-2009 — Standard for Verification and Validation in Computational Fluid Dynamics and Heat Transfer. The Standard specifies a quantitative approach to verification and validation (V&V) for computational simulations of fluid flow and heat transfer, including methods to estimate uncertainties in both simulation results and experimental data and metrics to compare them for validation purposes.

Abstract

This standard establishes procedures and terminology for assessing the accuracy and credibility of computational fluid dynamics (CFD) and heat transfer models by combining concepts from solution/code verification, experimental uncertainty analysis, and validation metrics. It provides guidance to quantify validation uncertainty and the comparison between simulation and experiment so practitioners can make objective statements about model accuracy at specified validation points.

General information

• Status: Stabilized maintenance; reaffirmed (R2021) and remains in effect in its 2009 edition.
• Publication date: 2009 (original publication).
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Computational modeling and simulation; Verification & Validation (VVUQ); Computational Fluid Dynamics (CFD); Heat transfer.
• Edition / version: V&V 20-2009 (R2021 reaffirmation).
• Number of pages: Listed lengths vary by source (commonly cited as ~87–100 pages depending on format).

Scope

Addresses quantification of the degree of accuracy of simulations for specified validation variables at specified validation points where experimental conditions are simulated. The Standard focuses on the validation comparison between simulation and experiment, including code and solution verification, propagation of input-parameter uncertainty to simulation results, characterization of experimental uncertainty, and calculation of validation uncertainty and comparison metrics. It does not prescribe validation for every possible measure within a domain (interpolation/extrapolation beyond validation points is left to engineering judgment).

Key topics and requirements

• Code verification and solution verification (methods to detect and quantify numerical errors and ensure correct implementation of the mathematical model).
• Assessment of the effect of input-parameter uncertainty on simulation uncertainty (propagation and sensitivity considerations).
• Evaluation and quantification of experimental uncertainty using established uncertainty analysis methods.
• Definition and computation of validation uncertainty and validation comparison metrics (validation comparison error vs. validation uncertainty).
• Guidance for interpreting validation results and making objective statements about model accuracy at validation points.

Typical use and users

Intended for engineers, modelers, researchers, and regulators who perform or evaluate CFD and heat-transfer simulations across industries such as aerospace, automotive, energy and power (including nuclear), biomedical devices, defense, and general mechanical and civil engineering where predictive simulation credibility is required. It is used to design validation studies, document validation results, and support model-based decision making.

Related standards

Part of ASME's VVUQ family of standards. Related documents include ASME V&V 10 (computational solid mechanics), ASME V&V 40 (assessing credibility of computational modeling for medical devices), VVUQ 1 (VVUQ terminology), and various VVUQ technical reports and supplements (e.g., VVUQ 20.1, VVUQ 10.2). These documents provide complementary guidance on terminology, application-specific credibility assessment, and uncertainty-quantification techniques.

Keywords

Verification; Validation; Uncertainty quantification (UQ); Computational Fluid Dynamics (CFD); Heat transfer; Validation metric; Code verification; Solution verification; Experimental uncertainty; VVUQ.

FAQ

Q: What is this standard?

A: ASME V&V 20-2009 is a consensus Standard that defines methods for verification, validation, and quantification of uncertainty for computational fluid dynamics and heat transfer simulations, enabling objective comparison between simulation and experimental data.

Q: What does it cover?

A: It covers code and solution verification, propagation of input-parameter uncertainty to simulation output, characterization of experimental uncertainty, calculation of validation uncertainty, and interpretation of validation comparison metrics for specified validation variables and points.

Q: Who typically uses it?

A: Practitioners and organizations performing CFD and heat-transfer modeling (engineers, analysts, researchers), validation test teams, regulators reviewing simulation credibility, and organizations establishing internal VVUQ processes across industries such as aerospace, automotive, energy, biomedical, and defense.

Q: Is it current or superseded?

A: The document is the 2009 edition and was placed on stabilized maintenance and reaffirmed (R2021); it remains an active ASME standard in that form. Users should check ASME’s standards listings for any newer revisions or related VVUQ publications that provide updates or supplements.

Q: Is it part of a series?

A: Yes — it is part of ASME’s Verification, Validation and Uncertainty Quantification (VVUQ) suite of standards and guides that together address terminology, methods, and application-specific credibility assessment (for example, V&V 10, V&V 40, and VVUQ 1).

Q: What are the key keywords?

A: Verification, Validation, Uncertainty Quantification, CFD, Heat Transfer, Validation Metric, Code Verification, Solution Verification, Experimental Uncertainty, VVUQ.