CFD general notation system (CGNS) - Status and future directions

Legensky, Steve M.; Edwards, David; Bush, Robert H.; Poirier, Diane M. A.; Rumsey, Christopher L.; Cosner, Raymond; Towne, Charles E.

doi:10.2514/6.2002-752

Cited by 12 publications

(14 citation statements)

References 2 publications

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“…4, which is a very simple grid made up of 6 nodes and 3 tetrahedral elements. Naturally, this grid can be described most easily with one Elements t node in which ElementType = TETRA 4, ElementRange = [1,3], ElementConnectivity = (1,2,3,4), (2,5,3,6), (2,6,3,4). However, it can also be described in terms of 3 general polyhedra, as follows.…”

Section: Unstructured Polyhedral Elements Capabilitymentioning

confidence: 99%

“…However, it can also be described in terms of 3 general polyhedra, as follows. There are 10 unique faces, each defined in this case by 3 nodes: the connectivity for each of these would be described in an Elements t node of type NGON n. Then, the connectivity of the faces making up the volume elements (in this case 4 faces for each of the 3 volume elements) would be described in an Elements t node of type NFACE n. In this particular case, faces (1,2,3,4) make up element 1, faces (5,6,7,8) make up element 2, and faces (8,9,10,3) make up element 3. Note that by convention, face normals point outward from the element; for faces with inward-pointing normals the face numbers must be given a negative number.…”

Section: Unstructured Polyhedral Elements Capabilitymentioning

confidence: 99%

“…GridCoordinates t GridCoordinates Elements t Elementfaces ElementType = NGON n ElementRange = [1,10] ElementConnectivity = (3,1,3,2), (3,1,2,4), (3,2,3,4), (3,3,1,4), (3,2,3,5), (3,2,5,6), (3,5,3,6), (3,3,2,6), …”

Section: Cgnsbase T Zone T Zone1mentioning

confidence: 99%

“…Every so often, referenceable documents concerning CGNS are published as well. [1][2][3][4][5][6][7][8][9] However, the up-to-date on-line documentation is the best way to learn the system and remain current. The main website address for CGNS is http://cgns.org, and all CGNS documentation is accessible via that site.…”

Section: Overview Of Cgnsmentioning

confidence: 99%

See 3 more Smart Citations

Recent Updates to the CFD General Notation System (CGNS)

Rumsey

Wedan²,

Hauser

et al. 2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The CFD General Notation System (CGNS)-a general, portable, and extensible standard for the storage and retrieval of computational fluid dynamics (CFD) analysis data-has been in existence for more than a decade (Version 1.0 was released in May 1998). Both structured and unstructured CFD data are covered by the standard, and CGNS can be easily extended to cover any sort of data imaginable, while retaining backward compatibility with existing CGNS data files and software. Although originally designed for CFD, it is readily extendable to any field of computational analysis. In early 2011, CGNS Version 3.1 was released, which added significant capabilities. This paper describes these recent enhancements and highlights the continued usefulness of the CGNS methodology.

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Section: Unstructured Polyhedral Elements Capabilitymentioning

confidence: 99%

Section: Unstructured Polyhedral Elements Capabilitymentioning

confidence: 99%

Section: Cgnsbase T Zone T Zone1mentioning

confidence: 99%

Section: Overview Of Cgnsmentioning

confidence: 99%

See 2 more Smart Citations

Recent Updates to the CFD General Notation System (CGNS)

Rumsey

Wedan²,

Hauser

et al. 2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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“…• Convert the grid from NLR's native ENFLOW format to several other formats, such as Plot3D or CGNS [11].…”

mentioning

confidence: 99%

Description of the F16-XL Geometry and Computational Grids Used in CAWAPI

Boelens

Badcock²,

Görtz

et al. 2007

45th AIAA Aerospace Sciences Meeting and Exhibit

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The objective of the Cranked-Arrow Wing Aerodynamics Project International (CAWAPI) was to allow a comprehensive validation of Computational Fluid Dynamics methods against the CAWAP flight database. A major part of this work involved the generation of high-quality computational grids. Prior to the grid generation an IGES file containing the air-tight geometry of the F-16XL aircraft was generated by a cooperation of the CAWAPI partners. Based on this geometry description both structured and unstructured grids have been generated. The baseline structured (multi-block) grid (and a family of derived grids) has been generated by the National Aerospace Laboratory NLR. Although the algorithms used by NLR had become available just before CAWAPI and thus only a limited experience with their application to such a complex configuration had been gained, a grid of good quality was generated well within four weeks. This time compared favourably with that required to produce the unstructured grids in CAWAPI. all-tetrahedral and hybrid unstructured grids has been generated at NASA Langley Research Center and the USAFA, respectively. To provide more geometrical resolution, trimmed unstructured grids have been generated at EADS-MAS, the UTSimCenter, Boeing Phantom Works and KTH/FOI. All grids generated within the framework of CAWAPI will be discussed in the article. Both results obtained on the structured grids and the unstructured grids showed a significant improvement in agreement with flight test data in comparison with those obtained on the structured multi-block grid used during CAWAP. Nomenclature

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The Hrewrite Library: A Term Rewriting Engine for Automatic Code Assembly

Lienhardt

2024

Lecture Notes in Computer Science

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CFD general notation system (CGNS) - Status and future directions

Cited by 12 publications

References 2 publications

Recent Updates to the CFD General Notation System (CGNS)

Recent Updates to the CFD General Notation System (CGNS)

Description of the F16-XL Geometry and Computational Grids Used in CAWAPI

The Hrewrite Library: A Term Rewriting Engine for Automatic Code Assembly

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