![]() | CFD General Notation System
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The specific purpose of the CFD General Notation System (CGNS) project is to provide a standard for recording and recovering computer data associated with the numerical solution of the equations of fluid dynamics. The intent is to facilitate the exchange of Computational Fluid Dynamics (CFD) data between sites, between applications codes, and across computing platforms, and to stabilize the archiving of CFD data.
The CGNS project originated in 1994 as a joint effort between Boeing and NASA, and has since grown to include many other contributing organizations worldwide. In 1999, control of CGNS was completely transferred to a public forum known as the CGNS Steering Committee. This Steering Committee is made up of international representatives from government and private industry.
The CGNS system consists of two parts: (1) a standard format for recording the data, and (2) software that reads, writes, and modifies data in that format. The format is a conceptual entity established by the documentation; the software is a physical product supplied to enable developers to access and produce data recorded in that format. All CGNS software is completely free and open to anyone.
In addition to the CGNS documentation, several conference papers and slide presentations are available, as well as minutes from the CGNS meetings and telecons.
The documentation, papers, etc., are generally available in both PDF and
HTML form.
The PDF files may be viewed and/or printed using a variety of freely
available software packages, including
Acrobat
Reader ,
GhostScript
, and
xpdf
.
A CGNStalk mailing list is available for discussion of the CGNS standard and software. To subscribe, fill out the subscription form at the CGNStalk Information Page. You'll receive an automated welcome message when your subscription is activated. Subscription requests are sent to the list owner for approval, so there may be a short delay. Once your subscription is activated, you may send messages to the CGNStalk mailing list by addressing them to cgnstalk@lists.nasa.gov. An archive of the CGNStalk mailing list is also available, to list subscribers only.
The various CGNS documents are listed below, and are consistent with the current CGNS version. The home or title page for each of the documents shows the document version number, and the specific CGNS version that the document applies to. Documentation is also available for
The current SIDS document represents a draft revision of the
AIAA Recommended Practice R-101A-2005.
The draft document has not undergone a formal approval vote by
the standards committee and is therefore not an approved AIAA
consensus document.
At the time of release of the next major version of the
CGNS data structures, the document will be voted on by the
committee members and, pending approval, become the next
version of the AIAA Recommended Practice.
The current AIAA Recommended Practice (corresponding to CGNS
Version 2.4) is available at the
AIAA
Online Store ,
and as a PDF file
(copyright AIAA, made available here by
permission) at the CGNS Documentation web site.
"The CGNS System," D. Poirier, S. R. Allmaras, D. R. McCarthy,
M. F. Smith, F. Y. Enomoto (AIAA Paper 98-3007).
[Available from AIAA
]
"Advances in the CGNS Database Standard for Aerodynamics and CFD," D. M. A. Poirier, R. H. Bush, R. R. Cosner, C. L. Rumsey, D. R. McCarthy (AIAA Paper 2000-0681). [HTML, PDF]
"CFD General Notation System (CGNS): Status and Future Directions," S. M. Legensky, D. E. Edwards, R. H. Bush, D. M. A. Poirier, C. L. Rumsey, R. R. Cosner, C. E. Towne (AIAA Paper 2002-0752). [HTML, PDF; copyright Intelligent Light, made available here by permission]
"Parallel I/O for the CGNS system," Th. Hauser (AIAA Paper 2004-1088).
[Available from AIAA
]
"Impact of CGNS on CFD Workflow," M. Poinot, C. L. Rumsey, M. Mani (AIAA
Paper 2004-2142).
[Available from AIAA
]
"CGNS-Based Data Model for Turbine Blade Optimization," H. Iepan,
F. Guibault, M.-G. Vallet, Magnan, R. (AIAA Paper 2005-0334).
[Available from AIAA
]
"Checking CFD interfaces in a multi-disciplinary workflow with an
XML/CGNS compiler," M. Poinot, E. Montreuil, E. Henaux (AIAA Paper
2005-1155).
[Available from AIAA
]
"Benchmarking Parallel I/O Performance for Computational Fluid Dynamics Applications," P. D. Pakalapati, T. Hauser (AIAA Paper 2005-1381). [HTML, PDF; copyright Thomas Hauser, made available here by permission]
"Application of CGNS software components for helicopter blade fluid-structure strong coupling," M. Poinot, M. Costes, B. Cantaloube (ERF Paper 31-107).
"Benchmarking the CGNS I/O Performance," Thomas Hauser (AIAA Paper 2008-0479). [HTML, PDF; copyright Thomas Hauser, made available here by permission]
"An Efficient and Flexible Parallel I/O implementation for the CFD General Notation System," Kyle Horne, Nate Benson, Center for High Performance Computing, Utah State University, Thomas Hauser, Academic & Research Computing, Northwestern University [PDF; copyright Thomas Hauser, made available here by permission]
"Recent Updates to the CFD General Notation System (CGNS)," C. Rumsey, B. Wedan, T. Hauser, M. Poinot (AIAA Paper 2012-1264). [PDF]
"CGNS Summary," Douglas McCarthy, Boeing Commercial Airplane Group, Open Meeting, Hampton, VA, May 20-21, 1999. [HTML, PDF]
"The CGNS System," Diane Poirier, ICEM CFD Engineering, 29th AIAA Fluid Dynamics Conference, Albuquerque, New Mexico, June 15-18, 1998. [See AIAA Paper 98-3007, above]
"The CGNS System," Armin Wulf, ICEM CFD Engineering, 37th Aerospace Sciences Meeting & Exhibit, Reno, Nevada, January 13, 1999. [HTML, PDF]
"Advances in the CGNS Database Standard for Aerodynamics and CFD," Diane Poirier, ICEM CFD Engineering, 38th Aerospace Sciences Meeting & Exhibit, Reno, Nevada, January 10-13, 2000. [HTML, PDF]
"CGNS CFD Data Standard," John Steinbrenner, Pointwise, Inc., Panel on Standards for Geometry Modeling and Grid Generation, 8th International Conference on Numerical Grid Generation in Computational Field Simulations, International Society of Grid Generation, Honolulu, Hawaii, June 2-6, 2002. [HTML, PDF]
"CFD General Notation System," Bruce Wedan, ANSYS/ICEM CFD, Presentation at NASA Ames, Jan, 2005. [HTML, PowerPoint (345K, 46 pages)]
"CGNS Tutorial Session," 36th AIAA Fluid Dynamics Conference, San Francisco, California, June 5-8, 2006.
"CGNS Tutorial Session," 48th AIAA Aerospace Sciences Meeting, Orlando, Florida, January 4-7, 2010.
"Recent Updates to the CFD General Notation System (CGNS)," C. Rumsey, B. Wedan, T. Hauser, M. Poinot, 50th AIAA Aerospace Sciences Meeting, Nashville, TN, January 9-12, 2012. (See AIAA Paper 2012-1264, above.) [PDF]
Minutes are available for the following CGNS Steering Committee meetings and telecons.
2011 | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
06 Dec | Telecon | (PDF) | 30 Aug | Telecon | (PDF) | 07 Jun | Telecon | (PDF) | ||||||||||
19 Apr | Telecon | (PDF) | 02 Mar | Telecon | (PDF) | 02 Feb | Telecon | (PDF) | ||||||||||
2010 | ||||||||||||||||||
01 Dec | Telecon | (PDF) | 20 Oct | Telecon | (PDF) | 08 Sep | Telecon | (PDF) | ||||||||||
10 Jun | Telecon | (HTML, PDF) | 29 Apr | Telecon | (HTML, PDF) | 18 Mar | Telecon | (HTML, PDF) | ||||||||||
28 Jan | Telecon | (HTML, PDF) | ||||||||||||||||
2009 | ||||||||||||||||||
01 Dec | Telecon | (HTML, PDF) | 02 Sep | Telecon | (HTML, PDF) | 07 Jul | Telecon | (HTML, PDF) | ||||||||||
20 May | Telecon | (HTML, PDF) | 1 Apr | Telecon | (HTML, PDF) | 7 Jan | Meeting | (HTML, PDF) | ||||||||||
2008 | ||||||||||||||||||
5 Nov | Telecon | (HTML, PDF) | 10 Sep | Telecon | (HTML, PDF) | 2 Jul | Telecon | (HTML, PDF) | ||||||||||
7 May | Telecon | (HTML, PDF) | 6 Jan | Meeting | (HTML, PDF) | |||||||||||||
2007 | ||||||||||||||||||
28 Nov | Telecon | (HTML, PDF) | 12 Sep | Telecon | (HTML, PDF) | 22 May | Telecon | (HTML, PDF) | ||||||||||
21 Mar | Telecon | (HTML, PDF) | 10 Jan | Meeting | (HTML, PDF) | |||||||||||||
2006 | ||||||||||||||||||
4 Oct | Telecon | (HTML, PDF) | 2 Aug | Telecon | (HTML, PDF) | 10 May | Telecon | (HTML, PDF) | ||||||||||
22 Mar | Telecon | (HTML, PDF) | 11 Jan | Meeting | (HTML, PDF) | |||||||||||||
2005 | ||||||||||||||||||
4 Oct | Telecon | (HTML, PDF) | 2 Aug | Telecon | (HTML, PDF) | 25 May | Telecon | (HTML, PDF) | ||||||||||
16 Mar | Telecon | (HTML, PDF) | 12 Jan | Meeting | (HTML, PDF) | |||||||||||||
2004 | ||||||||||||||||||
17 Nov | Telecon | (HTML, PDF) | 28 Sep | Telecon | (HTML, PDF) | 30 Jun | Meeting | (HTML, PDF) | ||||||||||
25 Mar | Telecon | (HTML, PDF) | 7 Jan | Meeting | (HTML, PDF) | |||||||||||||
2003 | ||||||||||||||||||
20 Nov | Telecon | (HTML, PDF) | 18 Sep | Telecon | (HTML, PDF) | 24 Jun | Meeting | (HTML, PDF) | ||||||||||
29 May | Telecon | (HTML, PDF) | 20 Mar | Telecon | (HTML, PDF) | 15 Jan | Meeting | (HTML, PDF) | ||||||||||
2002 | ||||||||||||||||||
4 Dec | Telecon | (HTML, PDF) | 18 Sep | Telecon | (HTML, PDF) | 24 Jun | Meeting | (HTML, PDF) | ||||||||||
15 May | Telecon | (HTML, PDF) | 13 Mar | Telecon | (HTML, PDF) | 14 Jan | Meeting | (HTML, PDF) | ||||||||||
2001 | ||||||||||||||||||
6 Nov | Telecon | (HTML, PDF) | 6 Sep | Telecon | (HTML, PDF) | 12 Jun | Meeting | (HTML, PDF) | ||||||||||
17 May | Telecon | (HTML, PDF) | 15 Mar | Telecon | (HTML, PDF) | 9 Jan | Meeting | (HTML, PDF) | ||||||||||
2000 | ||||||||||||||||||
7 Dec | Telecon | (HTML, PDF) | 25 Oct | Telecon | (HTML, PDF) | 24 Aug | Telecon | (HTML, PDF) | ||||||||||
21 Jun | Meeting | (HTML, PDF) | 11 May | Telecon | (HTML, PDF) | 16 Mar | Telecon | (HTML, PDF) | ||||||||||
10 Jan | Meeting | (HTML, PDF) | ||||||||||||||||
1999 | ||||||||||||||||||
9 Dec | Telecon | (HTML, PDF) | 14 Oct | Meeting | (HTML, PDF) |
The following gzipped text files are archives of CGNSTalk emails from the past years. Sometimes, these emails can be useful to search for answers to CGNS-related questions that have been posted in the past.
2010-2011 | ||||
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Archives | (Gzipped Text File) | |||
2008-2009 | ||||
Archives | (Gzipped Text File) | |||
2006-2007 | ||||
Archives | (Gzipped Text File) | |||
2004-2005 | ||||
Archives | (Gzipped Text File) | |||
2000-2003 | ||||
Archives | (Gzipped Text File) | |||