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Turbulence Modeling Resource
 

Model Readiness Rating System (proposed)

The model readiness rating system is a system for labeling the "readiness" of models so that developers and users can assess the maturity of a given model when determining whether to implement and test it for their own specific applications. This system does not judge the quality or capability of turbulence models. Instead, it is intended to provide information to the end user regarding how "well-defined," "well-used," and "well tested" a model is. A model that has been implemented and used in multiple codes and by multiple people will receive a higher rating than a model that has only been implemented and used in a single code. Furthermore, an attempt is made with this rating system to insure that the same model version in multiple codes will yield the same results.

Models on this website have not yet been rated according to this proposed rating system. In the meantime, comments about the proposed system are welcome. Please contact the Turbulence Model Benchmarking Working Group.
 

Rating Level

Description
 Level 0
 Level 1
 Level 3
 Level 4
Sponsor exists for the turbulence model
 required
 required
 required
 required
Model completely described and referenceable
 required
 required
 required
 required
Model in at least 1 CFD code
required
 required
 required
Model run on flat plate with grid study, and results made available
required
 required
 required
Model in two or more codes, and results (reasonably) agree as grids refined

required
 required
Model run on 2 or more verification cases, and results made available

required
 required
Model implemented in at least one code from outside home organization


required
Implementation and results independently verified (committee or other designee)


required

 

Notes:

  • The minimum level (Level 0) indicates that a model is well-described in a referenceable publication and has a sponsor. This level carries no negative connotations; it simply means that the model in question has not been widely tested or sufficiently verified beyond the original reference as yet.
  • A sponsor is a person who is pushes a given model through the process: running cases and reporting results as necessary, and working with the committee and page curator to meet any requirements needed to list the model on the website.
  • The phrase "verification cases" is rather loosely defined here to indicate cases for which a thorough grid refinement study has been conducted, so as to unambiguously establish the grid-converged result when using the model. Such cases are important because others can subsequently test their implementation of the same model, by seeing if their results for the verification cases are the same as the grid is refined.

 

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Last Updated: 16 October 2009


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