CGNS (Computational Fluid Dynamics General Notation System) is a standardized data format used in computational fluid dynamics (CFD) to store and exchange information related to fluid flow simulations. It serves as a data interface between CFD codes, allowing users to efficiently transfer data across different software platforms or versions.
The CGNS format provides a structured means of representing and storing diverse CFD data, including grid geometry, boundary conditions, solution fields, and auxiliary data. It employs a hierarchical structure that organizes the data in a logical manner, enabling ease of access, navigation, and interpretation. This structured format ensures compatibility and interoperability between different CFD software, enhancing the efficiency of collaboration and the ability to implement complex simulation workflows.
The CGNS data model supports unsteady and time-dependent simulations and allows the storage of both steady and transient simulation results. It is designed to handle a wide range of fluid flow problems, such as compressible and incompressible flows, laminar and turbulent flows, as well as multi-phase and reacting flows.
CGNS also incorporates a set of standardized data structures and conventions that ensure consistency in data representation, facilitating the exchange of data between different CFD tools without loss of information. These conventions cover aspects such as data dimensionality, data types, naming conventions, and unit conventions.
In summary, CGNS is a standardized data format for CFD simulations that enhances data interoperability, facilitates collaboration and workflow integration, and ensures consistency in data representation.
